Improve EC2 driver, moving extensions to the ex_ prefix.
Improve EC2 driver, moving extensions to the ex_ prefix.

git-svn-id: 353d90d4d8d13dcb4e0402680a9155a727f61a5a@941071 13f79535-47bb-0310-9956-ffa450edef68

wuyuewen/libcloud,illfelder/libcloud,Itxaka/libcloud,kater169/libcloud,pantheon-systems/libcloud,ByteInternet/libcloud,apache/libcloud,sahildua2305/libcloud,sfriesel/libcloud,lochiiconnectivity/libcloud,t-tran/libcloud,mistio/libcloud,andrewsomething/libcloud,aviweit/libcloud,ninefold/libcloud,schaubl/libcloud,mbrukman/libcloud,Itxaka/libcloud,jerryblakley/libcloud,StackPointCloud/libcloud,sergiorua/libcloud,vongazman/libcloud,mathspace/libcloud,sgammon/libcloud,cryptickp/libcloud,mtekel/libcloud,JamesGuthrie/libcloud,watermelo/libcloud,Keisuke69/libcloud,ClusterHQ/libcloud,aleGpereira/libcloud,schaubl/libcloud,samuelchong/libcloud,supertom/libcloud,mathspace/libcloud,briancurtin/libcloud,cloudControl/libcloud,apache/libcloud,aleGpereira/libcloud,SecurityCompass/libcloud,Verizon/libcloud,wido/libcloud,Jc2k/libcloud,iPlantCollaborativeOpenSource/libcloud,atsaki/libcloud,StackPointCloud/libcloud,dcorbacho/libcloud,wido/libcloud,jimbobhickville/libcloud,mgogoulos/libcloud,carletes/libcloud,jerryblakley/libcloud,MrBasset/libcloud,techhat/libcloud,jerryblakley/libcloud,thesquelched/libcloud,jimbobhickville/libcloud,wuyuewen/libcloud,Verizon/libcloud,samuelchong/libcloud,munkiat/libcloud,vongazman/libcloud,illfelder/libcloud,wrigri/libcloud,curoverse/libcloud,MrBasset/libcloud,sfriesel/libcloud,ZuluPro/libcloud,mgogoulos/libcloud,erjohnso/libcloud,smaffulli/libcloud,pantheon-systems/libcloud,carletes/libcloud,marcinzaremba/libcloud,NexusIS/libcloud,Kami/libcloud,cloudControl/libcloud,mbrukman/libcloud,wrigri/libcloud,jimbobhickville/libcloud,MrBasset/libcloud,Keisuke69/libcloud,Kami/libcloud,t-tran/libcloud,wrigri/libcloud,briancurtin/libcloud,Scalr/libcloud,sahildua2305/libcloud,NexusIS/libcloud,briancurtin/libcloud,Kami/libcloud,cloudControl/libcloud,JamesGuthrie/libcloud,Jc2k/libcloud,ClusterHQ/libcloud,thesquelched/libcloud,ZuluPro/libcloud,aleGpereira/libcloud,dcorbacho/libcloud,lochiiconnectivity/libcloud,mtekel/libcloud,DimensionDataCBUSydney/libcloud,wuyuewen/libcloud,pantheon-systems/libcloud,mtekel/libcloud,curoverse/libcloud,munkiat/libcloud,niteoweb/libcloud,watermelo/libcloud,marcinzaremba/libcloud,marcinzaremba/libcloud,sgammon/libcloud,Itxaka/libcloud,erjohnso/libcloud,carletes/libcloud,cryptickp/libcloud,thesquelched/libcloud,smaffulli/libcloud,watermelo/libcloud,DimensionDataCBUSydney/libcloud,andrewsomething/libcloud,niteoweb/libcloud,ZuluPro/libcloud,techhat/libcloud,lochiiconnectivity/libcloud,sergiorua/libcloud,StackPointCloud/libcloud,sfriesel/libcloud,sahildua2305/libcloud,SecurityCompass/libcloud,samuelchong/libcloud,Scalr/libcloud,mathspace/libcloud,munkiat/libcloud,mgogoulos/libcloud,mbrukman/libcloud,schaubl/libcloud,mistio/libcloud,andrewsomething/libcloud,mistio/libcloud,ByteInternet/libcloud,iPlantCollaborativeOpenSource/libcloud,supertom/libcloud,pquentin/libcloud,iPlantCollaborativeOpenSource/libcloud,ninefold/libcloud,vongazman/libcloud,sergiorua/libcloud,niteoweb/libcloud,dcorbacho/libcloud,erjohnso/libcloud,DimensionDataCBUSydney/libcloud,Cloud-Elasticity-Services/as-libcloud,aviweit/libcloud,illfelder/libcloud,NexusIS/libcloud,techhat/libcloud,curoverse/libcloud,atsaki/libcloud,smaffulli/libcloud,pquentin/libcloud,SecurityCompass/libcloud,JamesGuthrie/libcloud,wido/libcloud,supertom/libcloud,aviweit/libcloud,cryptickp/libcloud,atsaki/libcloud,ByteInternet/libcloud,kater169/libcloud,pquentin/libcloud,Cloud-Elasticity-Services/as-libcloud,Verizon/libcloud,Cloud-Elasticity-Services/as-libcloud,Scalr/libcloud,kater169/libcloud,apache/libcloud,t-tran/libcloud