Merge pull request #574 from tobiasjakobi/master

lima + omap: plug the mem leaks that were reported on IRC
Add back resampler selection code
(Menu) Add audio resampler selection to 'Drivers' section
(Resampler) Change 'OSK' to 'Resampler'
Make resampler "driver" hook code consistent with rest.
Forgot that FFmpeg also uses resampler.
Honor ident param.
(Menu) Move Shader Options up one level
(Menu) Move Overlay Options up one level
(RGUI) Fix labels for submenus
(Menu) Move all uncategorized remaining options to 'General Options'
(Menu) Add 'Pause if window focus lost' to General Options
(Menu) Add window compositing disable option in 'General Settings'
(only implemented for Windows Vista+ right now)
(RMenu) Refactor rmenu
Use consistent casing for some menu entries.

Convention so far is casing every word.
Reinit driver on composition change.
Revert "(RMenu) Refactor rmenu"

This reverts commit 6e8e22a458eaafa10af381133eb5edcf16cbb6ae.
(RMenu) Fix some labels
Move image files to gfx/image/
Update MSVC solution with new location of gfx/image/image.c