Rebranded to Xen Developer Tools ...

...

* Added check during install for correct XenForo version (now requires
XF 1.2 or above)

* Replaced templatePostRender replacements in PHP with Admin Template
Modifications

* Split the code event listeners for load_class_model and
load_class_controller into a function for each extended class and used
the Event Hint system.

* Changed directory structure slightly.

* Changed version numbering scheme to same as XenForo, e.g. 1000070.