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

Add 'Start time' column to game list

Don't remove card images from revealed decks

Action: Move Bottom Card to Graveyard

Double click/ENTER to join a room in lobby

Added the same functionality to the server tab

Can now join a room by highlighting a room and pressing ENTER. Works
nice with arrow navigation.

Can now double click on a room in the lobby to join

ref #452

Added fade to card drag items

[REVIEW]
Added a white mask to cards that are being dragged.

Preview: http://webmup.com/1we4W/

Cards Scale with mouse over action

QT_VERSION check now checks for correct version