Add a hotkey for disabling the framelimit.

Atm this is hardcoded to '\t'.
Add set/get functions for IsFramelimiterTempDisabled
drop Host_GetKeyState

This function isn't used any more and it shouldn't be used at all as it generates a sync request to the x11 server. So it has to wait for a complete round trip time.
Fixes glVertexAttribIPointer on GLES.

We need to pull in function pointers for OpenGL 3.0 in order to use glAttribIPointer.
This isn't too big of an issue, and this code will be gone in the future when we change over to libepoxy.
Just need to push code upstream to libepoxy to support Android with GLES and GL first.
Changes posmtx vertex attribute to integer.

This makes it so we don't need to do some dumb casting from float to integer in our shaders.
Only tested in OpenGL, needs to be tested in D3D.
Merge pull request #310 from Sonicadvance1/Integer-posmtx

Change over to use integer posmtx in our vertex shaders
Revert "Merge pull request #62 from degasus/log_truncate_path" because it was merged without consensus.

This reverts commit 1b581b7c27e06ed19d28e04c4345ce181fafc36e, reversing
changes made to 951612f08e1db15aeef35512bcb37d93dcb30b25.
Merge pull request #81 from degasus/skip_framelimit_hotkey

Add a hotkey for disabling the framelimit.