Update documentation links and format


Problem description
===================

The current documentation contains bad links and trailing spaces.



Changes description
===================

Fix link to bower as it is now hosted on a separate URL.
Fix link for grunt.
Remove trailing whitespaces as they are not needed.

Fix numbered list and force separation of the 2 lists.


How to try and test the changes
===============================

Go to this page and check the formated Markdown https://github.com/chevah/bootstrap-timepicker/tree/update-documentation

Thanks!