Allow for disabling individual languages, closes #66

ftplugin/gitsendemail.vim

@@ -1,6 +1,10 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'git') == -1
+  
 " Vim filetype plugin
 " Language:	git send-email message
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Last Change:	2009 Dec 24
 
 runtime! ftplugin/mail.vim
+
+endif