Updated Russian localization
Merge pull request #425 from unghost/20140330_ru

Updated Russian localization
Commit from Mozilla Verbatim by user sara.todaro@mozillaitalia.org.: 301 of 301 strings translated (0 fuzzy).
add MNC=20 for Telenor Hungary
update offline cache TTL
actually check if operator shelf has been injected yet
defer image loading (bug 898320)
Merge pull request #418 from ngokevin/master

defer image loading (bug 898320)
fix #970677 link to firefox for android help from that platform

collapse if/if into if/elif

respond to review comments