Cambios para soporte para Internet Explorer 9.
feat (directive): IE9 Support

IE9 support, so the carrousel will work on IE9.
Optional parameter IE9Support will enable this support.
If enabled, the directive will check if the browser is IE9
and, in this case, will use translate instead of translate3d
and simulate requestAnimationFrame with a timeout
Merge branch 'master' of https://github.com/Davidpt86/angular-carousel
Merge pull request #1 from Davidpt86/master

feat (directive): IE9 Support

IE9 support, so the carrousel will work on IE9. 
Optional parameter IE9Support will enable this support.
If enabled, the directive will check if the browser is IE9
and, in this case, will use translate instead of translate3d 
and simulate requestAnimationFrame with a timeout