Debut of ggtags-mode
Globally bind "C-x s" to svn-status

Previously bound to save-some-buffers, but I can M-x if I ever need it
Restore resize binding overriden by diff-mode
Only visualize tabs at bol when indent-tabs is nil

Previously visualized all tabs all the time. Now only visualize tabs
when they appear at the beginning of a line when indent-tabs-mode is nil.