Changed plugin setup to use RequireJS if present

Uses RequireJS to resolve dependencies and if this fails rolls back to the $("head").append() method.
Changed plugin setup to use RequireJS if present
Comply to code style
Check if the scrollbar is ready to use mousewheel events
add css and image file to main array in bower.json file
add image file to bower.json
Merge pull request #189 from rgksugan/master

Added css and image files to main in bower.json file
Merge pull request #183 from u-quark/master

Support for RequireJS
Merge pull request #185 from vtabary/master

Check if the scrollbar is ready to use mousewheel events