Add a configuration toggle to enable alerts when spectating.

Default behavior is to not alert.

Add full and short name for card color filters.

Avoid loading the same card's picture twice; Fix #745

Updated spectator eye image

Updated player fighting svg

+ Changed to be black
+ Made a little thicker

Bolder outline
More defined shape

Fixed 5+ hour issue for new games

When compiling with qt5, require at least version 5.0.3, fix #741

The problem was converting a negative int to an unsigned int. This was
resulting in a value of: (2^32) - n. Meaning that the room age was
extreamly old. After 48s the delay from the server will catch up and the
time diff will be 0 rather than negative, which is why after 48s the
room will change from 5+ hours to <1 min.

Improvement to servatrice database interface

Updated oracle logo

Iterate through the filter to see if everything matches the card.

New logo for changed tab

ctrl-click to add a card to a selection.

Add a play face down context menu item when in the hand zone.

Increased default pixmap cache

Fix zip support in oracle under win32; fix #736

Translation updates to support Transifex; fix #651

 * ignore .tx folder
 * cmake: when UPDATE_TRANSLATIONS=ON, extract new strings only to the
english translation file.
 * added info in CONTRIBUTING.md
 * updated english translations

Updated logo

Added modifier key to quick PM