Add 'buildRequestUrl' model method, to help user to build URL for using in AJAX methods.
Add 'post', 'get', 'put', 'delete' and 'patch' wrapper methods to the model which take advantage of 'Gillie.sync'.
Add underscore to request methods so that they don't conflict with other methods.
Merge branch 'v0.3dev' of https://github.com/PabloVallejo/gillie into v0.3dev

Conflicts:
	gillie.js