Replace .rvmrc by .ruby-version

Patch grammar in admin interface

Also relax the requirement. The .ruby-version represents
merely a recomendation for the Ruby version. The incompability
issues in the Ruby world are far less currently, than they were
when we introduced strict version enforcement. Thus strict
enforcement is no longer appropiate. Same holds for RubyGems.

This implicity also removes the recomendation on using RVM.
The .ruby-version file is supported by all major Ruby version
managers. Gemsets are no longer a needed feature since Bundler
handles multiple concurrrently installed Gems just well.

Save textarea value before rendering comments when clicked 'show more....'

Activate hovercards in SPV and conversations

Add separator between days, don't display grey zero

[WIP] Port notifications to Bootstrap and add filters, port hovercards

Check if the hashtag is a link in function .hashtagify

This reverts commit 06ab4986, reversing
changes made to 3c4d8d95.

Conflicts:
	Changelog.md

Fixed "hovercard avatars misaligned in notifications drop-down"

Solved problem with hashtags inside markdown links

Add handle indication on search page, improve design

Added limit by max_time to photos#index for prevent "infinite photo stream"

Fix publisher broken after jquery upgrade

Show hovercards in the notification drop-down for users on the same pod

Conflicts:
	Changelog.md

Propose for fix #4638

Added Changelog line

Added Specs for testing if the reshared origin post is deleted and therefore not shown in the atom feed

Fix different button sizes in new publisher

Port publisher and bookmarklet to bootstrap

Fix plaintext mode for mentionable

Also slight refactors to it.