Starting cvar system

Created the CvarList class witch contains a map of cvars
Made addCvar and getCvar methods.
Created the Settings class
Use the cvars r_width & r_height to create the window
Added setCvar method
Started the command line parser
Get the content of the file, tokenize it and call the right pasing function
Test of sfml sprites
Made an example of loading texture as the background
Now correctly interpret the set keyword
Created Controls class

Also added methods to test either the key is pressed or the associated action is true.
Modified the method checking if the action was true to handle multibinding
Mapped the key and parse them

Need to handle the ascii key the same way as the others, cf sfml
Now map the ascii keys

A tets print the associated action for the key pressed in the menu
Add Control's method to get literal codes

You can now get the string for a keycode
The code for an action is now avaible
Add bound keys
Merge branch 'develop' into cvar

Conflicts:
	server/src/main.cpp
removed pfaexe directory
transfered pfaexe to client
add the fps cvar and add the fps loop
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