Keyboard support, code movement, and TestManager

Major Changes
=============
- Added "testman.h" and "testman.cpp" to be used exclusively to test stuff (from a
GameManager perspective)
- Moved all the testing stuff to testman.cpp. 9game is just an empty class now to
manage other GameManagers
- Moved all the initializing stuff from 9Game to main. 9Game is like any other
GameManager now (just that it manages other GameManagers)
- Added keyboard.h and keyboard.c to handle keyboard interrupts (by replacing the
keyboard ISR)
- Keyboard is working :D can read more than one key at a time. (tested in
TestManager with WASD)

Minor Changes
=============
- Removed the exception throwing in SpriteLoader::unloadFile() (because it just
makes things unnecessarily complicated)
- added finished() to GameManager to indicate whether a GameManager is finished or
not
- Animation test + key control test. Sprite moves around depending on wasd key
input. (program ends when off screen to right)
- Set 0x00 as transparency color with drawSprite (TODO: change to make this
customizeable on runtime)
- Edited Makefile to reflect new changes

Notes
=====
- Animation seems to work nice and smooth in dosbox, slow in dosemu, so maybe I
should start testing in both dosemu and dosbox
- TODO: fix bug with drawSprite. When a sprite is drawn on the right of the screen
it "wraps around" to the other side by one pixel in width

 #ifndef KEYBOARD

 #define KEYBOARD

 /*#ifdef __cplusplus

 extern "C" {

 #endif*/

 /* functions and a custom ISR used to handle the keyboard 

 	- DOS by itself can only handle one key at a time, so we need to 

 	replace the interrupt service routine (ISR) to make it handle more 

 	than one key at a time

 */

 #include <dpmi.h>

 #include <io.h>

 #include <conio.h>

 #include <dos.h>

 // insert some keyboard codes here as DEFINES (or static chars)

 char enabled;

 volatile char keys[256]; // stores keyboard state

 // keyboard ISRs

 _go32_dpmi_seginfo oldKeyboardHandlerSeginfo;

 _go32_dpmi_seginfo newKeyboardHandlerSeginfo;

 void handler();

 void handler_end();

 int attach_keyboard_handler();

 void detach_keyboard_handler();

 char keyPressed(unsigned char key);

 /*

 #ifdef __cplusplus

 }

 #endif

 */

 #endif