Relatives paths and code clean up

Mayor fixes:
+ All Include directory paths have been converted to relative paths
+ All Library directory paths have been converted to relative paths
+ Configured a POST-BUILD event to automatically copy all necessary
DLL's to the DEBUG folder and RELEASE folder. (There's no need anymore
to copy and paste DLL's by hand in the DEBUG and RELEASE folder)
+ Specified additional libraries in project settings
+ Minor code clean up