update redtwitter
Merge remote-tracking branch 'origin/master'

Conflicts:
	modules/mod_redtwitter/elements/redtwittercategory.php
	modules/mod_redtwitter/helper.php
	modules/mod_redtwitter/mod_redtwitter.php
	modules/mod_redtwitter/mod_redtwitter.xml
	modules/mod_redtwitter/tmpl/default.php