FFOS contacts import

Closes #43
Test cache manifest update
Implemented history search

History search: added 2 tabs while searching, scroll to found message
in history
Move to 15th layer
Improve typing event (now only on value change)
Fixed styles from
https://github.com/zhukov/webogram/issues/286#issuecomment-45406436
Closes #137
Added new unread
Improve search styles
Seq holes improved
Improved updates handling
Bump to 0.1.6
Search bugfixes
Hotfixes
merge upstream, fix some translations.