Cross Platform Support

[strikekat]

The project was originally written under Linux and was relatively easy to port back, working for the most part.. but exposed a few flaws that the more permissive MSVC environment did not reveal.
Issues under Linux:

• "Font" class is ambiguous. Conflicts at least with an "XDI" Font. Study namespaces.
• TCHAR/PWD method does not work.

Issues under OSX:

• ConfigReader doesn't seem to work. Opening config.ini crashes the program with an EXC_BAD_ACCESS error. Strangely, ResourceManager is fine (Uses same routines??)
• Animation is broken. Just draws a slightly corrupted first frame.
• Launching from finder causes the executable to fail to find resources (Since the current directory stays at the directory in which finder was opened). A work-around may be to create a shell script for *nix systems to switch to the correct directory and launch the game.

Issues under both:

• Figure out OS detection macros to remove D3D under Linux/OSX.
• Changing FS/windowed/FS-windowed doesn't really work. It breaks font rendering, acts plain weirdly (Wont go back to a normal window, etc), and sometimes opens a new window in the Unity panel for each toggle. Messes up OS X bad too.
• Figure out OS-specific build information in the repo. Or make it OS-independent. Right now it contains VS Express files.

[strikekat]

Under OSX, it appears Allegro must be initialized before loading an ALLEGRO_CONFIG from file. This is not the case under Windows and Linux, but may necessitate some restructuring of engine initialization to work properly under all 3 platforms.

[strikekat]

Will need further testing, but as of the SDL rewrite, no major changes have been noticed under Linux and Windows (OSX will probably not be compiled for some time)

[strikekat]

The only current difference between the platforms is fullscreen cycling, and direct launching of the executable from finder within OSX (Which probably just needs a *nix shell script).