InAppBrowser Support

Add InAppBrowser support for Nihao themes.
First draft of options management / very simple version
Refactor options folder the way the others are set up
Refactor options meta key as a constant
Default options values should be out of storage class
Handle static and dynamic options types and add some hooks for a third party script to be able to add options
Bugfix: refresh_interval should be a *positive* integer
Add static options to config.js generation
Add dynamic options to synchronization webservice
First pass of WordPress coding standards over files I updated
Expose static options as 'options' key into Config object
Add Options management into JS app: static and dynamic options are merged again and persist into localstorage
Put dynamic options retrieval before everything
Removed automatic refreshing
Bugfix: add a callback to app.initialize and deal better with options and asynchronous calls
Removed everything about options types, and let only 'static' type