Dropping squashing commits from contribution process

 - Rephrases squashing of commits before submitting from a requirement to a recommendation
 - minor fixes around that
Update client.zh_TW.yml

Minor fixes for the chinese translations
Style 'urgent' composer popups differently

The two "bad behavior" composer popups get the 'urgent' class, which colors them red.
Standardize on second person on preferences page
Disabled editing of SSO overridden fields
update czech localization

Contributors: marmat, OukiDouki, Mirek2, zoul, MikulasDite
fixing mobile notificaiton badge
Merge pull request #2085 from awesomerobot/master

fixing mobile notificaiton badge
BUGFIX: rescue should splat
Add README for poll plugin (#2089)
Merge pull request #2086 from vikhyat/new-unread-i18n

i18n of new/unread text next to topics
Merge pull request #2090 from bcjordan/poll-readme

Add README for poll plugin (#2089)
PERF: remove jQuery.UI monkey patch
PERF: remove ember renderspeed until we make it optional (disabled by default in prd)
Merge pull request #2083 from vikhyat/firefox-paste-image

Hack for supporting pasting images into the composer in Firefox
BUGFIX: spec would blow up when DST kicked in
Merge pull request #2082 from Mikulas/czech-localization-march14

update czech localization
UI: remove usercard hacks, specify width explictly
Merge pull request #2075 from riking/second-person

Standardize on second person on preferences page
Merge pull request #2064 from staryume/patch-5

Update client.zh_TW.yml