Meta: Resolve existing doc/Todo.txt issues

[Echelon9]

Meta issue for the following issues found in the existing doc/Todo.txt:

• Modularize inline vertex buffers (Begin()/End())
• Support Direct3D_SetPushBufferSize()
• Add Pause hotkey
• Add FPS counter
• Use SetAllParameters to reverse engineer 3911 DSound functions
• DirectSoundUseFullHRTF -> 0x192D8C (Halo)..too small to detect?
• Palette needs to actually be used, not just allowed to execute.
• Check if 4361 Resource8_Release is the same as 4627 & 3925 (3911)
• Configurable dead zone, for touchy controllers
• Push Buffer Size is stored in a global. This may be important (hard to tell)
• Special temporary X_D3DResource handles need to be tracked and periodically garbage collected
• Register() probably needn't re-unswizzle each time
• Resolve Heap Allocation crash (#7)
• Stabilize TLS
• Perfect the timing on KeTickCount()

Once complete, remove doc/Todo.txt

Done

• ~~SetThreadPriority is basically ignored right now (#9)~~