Merge remote-tracking branch 'singu/master'

Conflicts:
	indra/newview/llviewerwindow.cpp

c_str() dropped out (50f03d83c0c04e415aae0f5451f15d1a2621abf1).
Added it back.
Translation updates
Remove -Wno-sign-compare and fix DISABLE_FATAL_WARNINGS

Turn on sign-compare warnings and allow fatal warnings when
using -DDISABLE_FATAL_WARNINGS:BOOL=OFF during configuration.
The default is no -Werror.
Merge remote-tracking branch 'singu/master'
Add -Wno-sign-compare back.
Inline accessors of HippoGridInfo.
Allow the export check box to show for rezzed objects in opensim - fixes a copypasta error
Make GCC 4.8 a little happier by removing a copy pasted pointless line
Merge remote-tracking branch 'lirusaito/master'
Merge remote-tracking branch 'aleric/master'