iOS: Fix switch warning in RAGameView.m
Revert "Add stub functions for get_video_driver in frontends"

This reverts commit 98eaaf8f5fa64b71a53f18aab6e999cdbc0d63a9.
Merge pull request #1041 from lioncash/ioswarn

iOS: Fix switch warning in RAGameView.m
iOS: Get rid of some unsigned/signed comparison warnings.
Merge pull request #1043 from lioncash/warnings

iOS: Get rid of unsigned/signed comparison warnings.
shader_parse: Fix missing enum identifier warning
iOS: Fix mismatching types in iOS 7 keyboard code
Move frame_time_last= 0 to rarch_set_action_state
iOS: Minor cleanup

- Clean up trailing whitespace.
- Get rid of a redundant initialize call.
- Access variables through their property equivalents.
Merge pull request #1044 from lioncash/warnings

Fix a few iOS/misc warnings.
(iOS) Add HAVE_LAKKA and HAVE_GLUI
Add "Force-disable sRGB FBO" option for buggy Intel OpenGL drivers
on Windows - should hopefully fix messed up colors with it enabled (untested)
iOS: Move instance variables in RetroArch_iOS over to properties.
iOS: Fix another signed/unsigned mismatch warning
Add SD_FLAG_CMD_APPLY_AUTO to setting 'Force-disable sRGB FBO'
Merge pull request #1045 from lioncash/warnings

iOS: Kill off some more warnings.
iOS: Use accessors instead of direct variables
Merge pull request #1046 from lioncash/warnings

iOS: Use accessors instead of direct variables
Refactor MODE_MENU_PREINIT code
Refactor MENU_CLEAR_INPUT