Addressed feature req #294
Add 'ignored' class to blocked users for styling

Style with line-through.
Address issue Issue #424 -- cliff and meghana
Addresses some issues from the hackathon

  * https://github.com/cryptocat/cryptocat/issues/135#issuecomment-22839689

  * https://github.com/cryptocat/cryptocat/pull/413/files#r5829636
Merge pull request #445 from arlolra/hackathon

Addresses some issues from the hackathon
Merge pull request #440 from casebeer/ignored-user-styles

Add 'ignored' class to blocked users for styling
Quick fix for #447
Drop unencrypted messages.

See #447 for discussion.
lint
Merge pull request #449 from arlolra/plaintext

Drop unencrypted messages.
Tweak
Add localization sentences for #434 and #439
Big translation update, with fixes and expansions (#331)

Remaining languages:
* Chinese (Hong Kong)
* Urdu
* Tibetan
* Estonian
* Basque
* Latvian
* Uighur
Merge pull request #441 from bb7555/master

Issue #424
Revert "Merge pull request #441 from bb7555/master"

This reverts commit 148fff62300df6a9b347175ef698cd31fcd81cf3, reversing
changes made to d5f3274e3189b4923efcad596a9b40e49fe035be.
Add a guideline
Add timestamps to join/leave messages (fix #450)
Fix Travis
Much-needed cleanup for connection failure handling (fix #451)
CSS tweaks and a bug fix