#1639 - Make dialog "Cancel" links into buttons like "Submit"
- modified gallery.dialog.js: made cancel a <button>, added same classes as submit
- modified screen.css to size/position the cancel buttons correctly
#2031 - Add class_exists() before method_exists() if class existence is unknown.
- fixed all instances of this in core code
- deleted previous Zend Guard Loader workaround in MY_Kohana.php
- updated Bootstrap.php to reflect deleted MY_Kohana.php
#2032 - Fix short form submit/cancel button formatting.
- fixed the height of the submit buttons to match the input box
- changed the cancel links into cancel buttons
- added the hover effect to the buttons when used in in_place_edit (e.g. admin/tags)
Merge pull request #176 from shadlaws/fix_2031

#2031 - Add class_exists() before method_exists() if class existence is unknown.
Merge pull request #177 from shadlaws/fix_2032

#2032 - Fix short form submit/cancel button formatting.
Merge pull request #175 from shadlaws/fix_1639

#1639 - Make dialog "Cancel" links into buttons like "Submit"
Merge branch 'master' into kohana_3

Conflicts:
	application/Bootstrap.php