Manage Git templates

[alban]

Users should be able to create templates. Associated resources should be retrieved from a specified git repository.

The user should be able to :

* update the resources of a template
* use the template in its shows
* destroy a unused template

[alban@…]

commit 70813b7da4ca629f52fe1ab89ce0d47566d99d49
Author: Alban Peignier <alban@…>
Date: Tue Jul 20 01:21:09 2010 +0200

Create user managed templates with git resources. Refs #15

[alban@…]

commit 0ead693cbae79e21f5c4828ffc14506af0279788
Author: Alban Peignier <alban@…>
Date: Mon Jul 26 21:13:31 2010 +0200

Reload liquid templates when one of them have been updated. Refs #15

[alban]

In Rails 2.3.8, ActionView::Template::EagerPath loads every template in its path at the first search.

A unload! method has been added and the EagerPath? which manages our liquid templates directory is registered and unloaded on demand (when a template is modified by exemple).