[#25045] User Preferences Input, not enough menu choices
[#26525] Saving the Maya preset and another key configs
Untangle keyconfig presets and interaction presets (maya keyconfig would set interaction setting, blender interaction would set keyconfig).
Preset menu on slash screen now displays a list of available keyconfigs (as before) but will also set the correspondant interaction presets, if it exists)
ui/ --> startup/bl_ui
op/ --> startup/bl_operators
scripts/startup/ is now the only auto-loading script dir which gives some speedup for blender loading too.
~/.blender/2.56/scripts/startup works for auto-loading scripts too.