Changes and features

	* Added way to specify a custom bar height
	* Added custom button width
	* Button width calculated automatic if no one specified
	* Changed touch event to up to provide other manipulations of the bar and button
Customization features

	* Added possibility to customize indicador (included example on appdelegate)
	* Added possibility to customize buttons bar using delegator
	* Created example delegator on appdelegate
	* Possibility of change design on MHTabBarController (not recommended)
	* Custom indicator resizes if button width changed
Custom bar color and example of different buttons changed on delegator