Several improvements to create_nmf.py
Several improvements to create_nmf.py

Add -v/--verbose so you can see what the tool is doing.

Fix for StageDependencies so that it treats the main files
in the same special way that _GenerateManifest does.  The
current behavior creates duplicate nested copies of
of the all main (.nexe) files you pass it.

Remove trailing whitespace.

Add a __repr__ for ArchFile so printing them is less opaque.

Remove ErrorOut in favor of Error exception.  Calling 
sys.exit() all over the place makes things like unit testing
harder.  Error exception is now caught in the main entry 
point so the user doesn't see stack traces for errors.

BUG=

Review URL: https://chromiumcodereview.appspot.com/10837028

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@149557 0039d316-1c4b-4281-b951-d872f2087c98

axinging/chromium-crosswalk,zcbenz/cefode-chromium,Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,mogoweb/chromium-crosswalk,fujunwei/chromium-crosswalk,dednal/chromium.src,ChromiumWebApps/chromium,hujiajie/pa-chromium,axinging/chromium-crosswalk,dushu1203/chromium.src,hujiajie/pa-chromium,fujunwei/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,pozdnyakov/chromium-crosswalk,hgl888/chromium-crosswalk-efl,M4sse/chromium.src,bright-sparks/chromium-spacewalk,markYoungH/chromium.src,mohamed--abdel-maksoud/chromium.src,anirudhSK/chromium,junmin-zhu/chromium-rivertrail,M4sse/chromium.src,axinging/chromium-crosswalk,nacl-webkit/chrome_deps,Fireblend/chromium-crosswalk,junmin-zhu/chromium-rivertrail,jaruba/chromium.src,chuan9/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,ltilve/chromium,dednal/chromium.src,M4sse/chromium.src,ltilve/chromium,hujiajie/pa-chromium,chuan9/chromium-crosswalk,zcbenz/cefode-chromium,M4sse/chromium.src,junmin-zhu/chromium-rivertrail,markYoungH/chromium.src,dushu1203/chromium.src,junmin-zhu/chromium-rivertrail,hgl888/chromium-crosswalk-efl,dushu1203/chromium.src,junmin-zhu/chromium-rivertrail,Chilledheart/chromium,Fireblend/chromium-crosswalk,Just-D/chromium-1,anirudhSK/chromium,Just-D/chromium-1,timopulkkinen/BubbleFish,ChromiumWebApps/chromium,Fireblend/chromium-crosswalk,nacl-webkit/chrome_deps,bright-sparks/chromium-spacewalk,mohamed--abdel-maksoud/chromium.src,hgl888/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,axinging/chromium-crosswalk,dednal/chromium.src,anirudhSK/chromium,chuan9/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,hgl888/chromium-crosswalk,Pluto-tv/chromium-crosswalk,timopulkkinen/BubbleFish,Chilledheart/chromium,pozdnyakov/chromium-crosswalk,bright-sparks/chromium-spacewalk,timopulkkinen/BubbleFish,M4sse/chromium.src,anirudhSK/chromium,pozdnyakov/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Jonekee/chromium.src,Chilledheart/chromium,pozdnyakov/chromium-crosswalk,junmin-zhu/chromium-rivertrail,patrickm/chromium.src,ChromiumWebApps/chromium,dushu1203/chromium.src,crosswalk-project/chromium-crosswalk-efl,anirudhSK/chromium,hgl888/chromium-crosswalk,bright-sparks/chromium-spacewalk,axinging/chromium-crosswalk,krieger-od/nwjs_chromium.src,markYoungH/chromium.src,hujiajie/pa-chromium,dednal/chromium.src,dushu1203/chromium.src,littlstar/chromium.src,axinging/chromium-crosswalk,bright-sparks/chromium-spacewalk,Just-D/chromium-1,littlstar/chromium.src,mogoweb/chromium-crosswalk,patrickm/chromium.src,ChromiumWebApps/chromium,hgl888/chromium-crosswalk-efl,patrickm/chromium.src,hgl888/chromium-crosswalk-efl,crosswalk-project/chromium-crosswalk-efl,junmin-zhu/chromium-rivertrail,jaruba/chromium.src,Chilledheart/chromium,dushu1203/chromium.src,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Jonekee/chromium.src,dednal/chromium.src,PeterWangIntel/chromium-crosswalk,axinging/chromium-crosswalk,jaruba/chromium.src,nacl-webkit/chrome_deps,hgl888/chromium-crosswalk-efl,krieger-od/nwjs_chromium.src,bright-sparks/chromium-spacewalk,pozdnyakov/chromium-crosswalk,ondra-novak/chromium.src,dushu1203/chromium.src,Just-D/chromium-1,bright-sparks/chromium-spacewalk,crosswalk-project/chromium-crosswalk-efl,hujiajie/pa-chromium,zcbenz/cefode-chromium,dednal/chromium.src,hgl888/chromium-crosswalk-efl,junmin-zhu/chromium-rivertrail,dushu1203/chromium.src,hgl888/chromium-crosswalk-efl,anirudhSK/chromium,hujiajie/pa-chromium,axinging/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,littlstar/chromium.src,Just-D/chromium-1,markYoungH/chromium.src,mogoweb/chromium-crosswalk,Chilledheart/chromium,fujunwei/chromium-crosswalk,jaruba/chromium.src,ondra-novak/chromium.src,TheTypoMaster/chromium-crosswalk,Fireblend/chromium-crosswalk,ltilve/chromium,crosswalk-project/chromium-crosswalk-efl,nacl-webkit/chrome_deps,Pluto-tv/chromium-crosswalk,M4sse/chromium.src,junmin-zhu/chromium-rivertrail,mohamed--abdel-maksoud/chromium.src,zcbenz/cefode-chromium,anirudhSK/chromium,mohamed--abdel-maksoud/chromium.src,TheTypoMaster/chromium-crosswalk,timopulkkinen/BubbleFish,hgl888/chromium-crosswalk,Pluto-tv/chromium-crosswalk,M4sse/chromium.src,littlstar/chromium.src,zcbenz/cefode-chromium,ChromiumWebApps/chromium,Chilledheart/chromium,dednal/chromium.src,crosswalk-project/chromium-crosswalk-efl,ondra-novak/chromium.src,fujunwei/chromium-crosswalk,ChromiumWebApps/chromium,pozdnyakov/chromium-crosswalk,hujiajie/pa-chromium,chuan9/chromium-crosswalk,mogoweb/chromium-crosswalk,Fireblend/chromium-crosswalk,krieger-od/nwjs_chromium.src,jaruba/chromium.src,krieger-od/nwjs_chromium.src,timopulkkinen/BubbleFish,dushu1203/chromium.src,timopulkkinen/BubbleFish,zcbenz/cefode-chromium,bright-sparks/chromium-spacewalk,patrickm/chromium.src,Just-D/chromium-1,hgl888/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,nacl-webkit/chrome_deps,dednal/chromium.src,PeterWangIntel/chromium-crosswalk,mogoweb/chromium-crosswalk,krieger-od/nwjs_chromium.src,Pluto-tv/chromium-crosswalk,zcbenz/cefode-chromium,markYoungH/chromium.src,crosswalk-project/chromium-crosswalk-efl,dednal/chromium.src,patrickm/chromium.src,ondra-novak/chromium.src,mohamed--abdel-maksoud/chromium.src,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,nacl-webkit/chrome_deps,littlstar/chromium.src,fujunwei/chromium-crosswalk,M4sse/chromium.src,chuan9/chromium-crosswalk,timopulkkinen/BubbleFish,M4sse/chromium.src,patrickm/chromium.src,patrickm/chromium.src,zcbenz/cefode-chromium,TheTypoMaster/chromium-crosswalk,ChromiumWebApps/chromium,anirudhSK/chromium,junmin-zhu/chromium-rivertrail,jaruba/chromium.src,Fireblend/chromium-crosswalk,hujiajie/pa-chromium,Fireblend/chromium-crosswalk,fujunwei/chromium-crosswalk,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,hujiajie/pa-chromium,timopulkkinen/BubbleFish,hujiajie/pa-chromium,jaruba/chromium.src,krieger-od/nwjs_chromium.src,Chilledheart/chromium,jaruba/chromium.src,timopulkkinen/BubbleFish,anirudhSK/chromium,fujunwei/chromium-crosswalk,ltilve/chromium,Jonekee/chromium.src,markYoungH/chromium.src,dushu1203/chromium.src,M4sse/chromium.src,Fireblend/chromium-crosswalk,nacl-webkit/chrome_deps,jaruba/chromium.src,pozdnyakov/chromium-crosswalk,Fireblend/chromium-crosswalk,zcbenz/cefode-chromium,zcbenz/cefode-chromium,Jonekee/chromium.src,timopulkkinen/BubbleFish,Jonekee/chromium.src,Jonekee/chromium.src,Just-D/chromium-1,fujunwei/chromium-crosswalk,Chilledheart/chromium,PeterWangIntel/chromium-crosswalk,littlstar/chromium.src,Pluto-tv/chromium-crosswalk,ondra-novak/chromium.src,hgl888/chromium-crosswalk,Chilledheart/chromium,ltilve/chromium,anirudhSK/chromium,hgl888/chromium-crosswalk-efl,Jonekee/chromium.src,ChromiumWebApps/chromium,hgl888/chromium-crosswalk-efl,jaruba/chromium.src,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,fujunwei/chromium-crosswalk,junmin-zhu/chromium-rivertrail,ChromiumWebApps/chromium,crosswalk-project/chromium-crosswalk-efl,Jonekee/chromium.src,ondra-novak/chromium.src,ltilve/chromium,mogoweb/chromium-crosswalk,timopulkkinen/BubbleFish,patrickm/chromium.src,ChromiumWebApps/chromium,hgl888/chromium-crosswalk-efl,mohamed--abdel-maksoud/chromium.src,markYoungH/chromium.src,littlstar/chromium.src,jaruba/chromium.src,chuan9/chromium-crosswalk,dushu1203/chromium.src,markYoungH/chromium.src,littlstar/chromium.src,nacl-webkit/chrome_deps,krieger-od/nwjs_chromium.src,mohamed--abdel-maksoud/chromium.src,mogoweb/chromium-crosswalk,markYoungH/chromium.src,PeterWangIntel/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,krieger-od/nwjs_chromium.src,ondra-novak/chromium.src,ltilve/chromium,dednal/chromium.src,chuan9/chromium-crosswalk,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,axinging/chromium-crosswalk,nacl-webkit/chrome_deps,Just-D/chromium-1,pozdnyakov/chromium-crosswalk,pozdnyakov/chromium-crosswalk,pozdnyakov/chromium-crosswalk,dednal/chromium.src,nacl-webkit/chrome_deps,mohamed--abdel-maksoud/chromium.src,PeterWangIntel/chromium-crosswalk,patrickm/chromium.src,Pluto-tv/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,zcbenz/cefode-chromium,mogoweb/chromium-crosswalk,hujiajie/pa-chromium,hgl888/chromium-crosswalk,ChromiumWebApps/chromium,Pluto-tv/chromium-crosswalk,Jonekee/chromium.src,markYoungH/chromium.src,pozdnyakov/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,anirudhSK/chromium,ltilve/chromium,hgl888/chromium-crosswalk,ondra-novak/chromium.src,axinging/chromium-crosswalk,chuan9/chromium-crosswalk,anirudhSK/chromium,bright-sparks/chromium-spacewalk,ltilve/chromium,M4sse/chromium.src,Just-D/chromium-1,mogoweb/chromium-crosswalk,nacl-webkit/chrome_deps,mogoweb/chromium-crosswalk,ondra-novak/chromium.src,ChromiumWebApps/chromium,markYoungH/chromium.src