adding a command to merge multiple archives (chaining resource from archives in order)
adding a command to merge multiple archives (chaining resource from archives in order)

Contributed by: zeinwali@gmail.com

git-svn-id: abd770af2affaf62930f25b244f6edafe8ddae5b@496 164481a5-15cb-f69f-4b93-856c5b7754c5

ting-yuan/web-page-replay,colin-scott/web-page-replay,bpsinc-native/src_third_party_webpagereplay,ting-yuan/web-page-replay,colin-scott/web-page-replay,snorp/web-page-replay,chromium/web-page-replay,andrey-malets/web-page-replay,chromium/web-page-replay,snorp/web-page-replay,bpsinc-native/src_third_party_webpagereplay,bpsinc-native/src_third_party_webpagereplay,andrey-malets/web-page-replay