Clean up a small pile of compiler warnings.

Fixes the "Card preview window gets stuck and can't be removed" issue by...

Remove branch decoration

Translation fixes

Optimize qt plugins installation

Better icon packing in PlayerListWidget.

Fixes the "Card preview window gets stuck and can't be removed" issue by saving the cardname, instead of getting it back from the popup (with possible issues with case sensitivity). Also closes an old popup when a new is created.

 * Always install “release” plugins
 * install only plugins actually used

Fix crash on close #255

Fix #484: Missing tooltip

Fix travis compilation with osx+qt5

Homebrew currently installs qt 5.4.0

Missing tooltip

We previously parsed only .cpp files, but some strings are inlined in
header files.

How Many Cards

More sets handling improvements

Removing Black Lotus Price from System

ucfirst(setCode): requires oracle re-run
reorder columns
rename the “short name“ column as “set code“
ensure proper casting for releaseDate and sortKey fields (refs 00a5ed0b)

Added more space between chat

Servatrice trustedsources

Added underline to links in chat

Added a couple extra pixels in the chat. Make it look a little less
squished.

Before: http://imgur.com/7U6oe82
After: http://imgur.com/C8gGpDY

[REVIEW]
Links now have a blue underline to better indicate they are clickable.

Preview: http://imgur.com/gQZEv4I

Sets handling improvements

Double click room fix

Port #436 to QDateTime