Make run.sh script executable after running cpack.
Modified startup script to pass cmd line parameters.

This script is incomplete. Users might want to add $ cd [game-dir] at
the top of the script because it won't run anywhere else except form the
game folder.
Changes in libraries linkage.

SDL shared object library is no longer copied in the game build folder
and it is no longer present in the game package. On Linux it is required
that the libsdl1.2 package is installed. On Windows the SDL.dll will be
copied in the game package by the build process.
Fixed some compile warnings.
-Wextra -Wall excluded from compile process. 

Major refactoring needed if all warnings needs be fixed.
Updated README and TODO list.