Fix/file input

Fixing File-Input by removing transclude
Also add 2 attributes to the LxInput Directive : 
 - "value" attribute to handle dynamic values and automatically set the value if needed to
 - "change" attribute as callback to return the dom input to the function
Need to be fixed in the [Allman style](http://en.wikipedia.org/wiki/Indent_style#Allman_style).