add oauth check if users.get_current_user() is None

* user logging
Fix typo
Merge pull request #5 from jangxyz/FIX-get_config

Fix Wikpage.get_config
FIX error when config page is empty

* add test
	* `tests.test_models.WikiPageGetConfigTest.test_empty_config_page`
Merge pull request #6 from jangxyz/FIX-get_config-2

FIX error when config page is empty
Support youtube video
Implement page delete
Minor fixes
Fix bug on WikiPage.update_links
Update CodeMirror version
add syntax highlight
add highlight.js's license (BSD) to LICENSE
Merge pull request #1 from nabugoon/highlight

add syntax highlight
Merge pull request #7 from nabugoon/master

add syntax highlight
Fix Model.delete() to set modifier to None
Fix #8
FIX KeyError on req.POST['preview']

* preview should not be mandatory
add oauth to models.py
Merge oauth-current-user to 'master'

* adds oauth response to appengine server