replace build # script with one that takes git dev branch commit count
add ability to ask for privileges in pre-10.9
Merge branch 'master' of CAXAccessibilityObserver

Conflicts:
	Source/CAXAccessibilityObserver.m
	Source/CAXSystemPreferencesUtil.h
	Source/CAXSystemPreferencesUtil.m
update accessibility window to use icon
shrink AX alert window
expose wasAccessibilityTrusted