Added missing license info in the CREDITS file.
Fixed editor launch.
Fixed editor tile selector
Rooms and Traps layout is now shared between Editor and game.
Mouse handling copied/pasted from GameMap to have the same logic. For example, creatures can be picked up like ingame.
fixes #17
By default or when right mouse button is pressed, nothing is selected in editor mode. To add room/trap/tiles, you have to clic on the corresponding icon.
Added server messages for editor. In editor mode, if a room/trap is built on dirt tiles, gold tile or rock, they are claimed/digged automatically.
Rooms/traps cannot be built on tiles where there are already creatures/traps/rooms
Added a parameter to Server for him to know if we started editor or game mode. In editor mode, creatures have no turn :)
A map can be saved only if no creature is in the hand
Within the editor, creatures can be dropped everywhere they can walk (dirt, claimed - same color or not, water, lava).
Fixed a bug when reading map info (space is considered as a separator char by stringstream)
As seen by @Bertram25, color should not be checked when in editor mode when a player picks up a creature
Merge pull request #142 from hwoarangmy/development

Fixed editor launch.
Added support to cross-fade some battle music when encountering enemies.

As client game map info parameters were loaded after the game mode was activated
due my recent change about loading the level only once the server tells which to load,
I had to fix the game mode to activate only after the client game map level loading.

This fixed the calm music not played anymore when starting the game.

I also made the server tell the specific client when attacked or attacking because
the attack and damage taking logic was only done on server-side.

Fixes #23
Fixed remote client game start

The client/server events would not be processed without that fix.
Made it so a server message is only sent to the client when starting or stopping the battle music.

As discussed with @hwoarangmy, I moved the battle music timing logic into the serve game map,
and the battle music timer into the player class, as it is a player thing, as righteously said
by hoarangmy.

I also normalized the battle music to avoid hearing glitches in the sound as reported by Akien.
Oops, fixed a wrong comment.
Small fixes based on @hwoarangmy's input. :)