Added an option to have a responsive slider

If the slider width or height is set to 100% when you resize the window the slider tooltip doesn't change its position. With this modification you can set a 'data-slider-responsive' attribute that makes the tooltip moving properly on window resizing.
Added an option to have a responsive slider

If the slider width or height is set to 100% when you resize the window the slider tooltip doesn't change its position. With this modification you can set a 'data-slider-responsive' attribute that makes the tooltip moving properly on window resizing.
Update README.md
Merge pull request #2 from zonia3000/master

Added unit testing, examples and doc for responsive
Added unit testing, examples and doc for responsive
Merge branch 'patch-1'

Conflicts:
	js/bootstrap-slider.js
Merge remote-tracking branch 'upstream/master'

Conflicts:
	index.html
	tpl/index.tpl
Merge branch 'patch-1' of https://github.com/zonia3000/bootstrap-slider into patch-1
Fix error on merge
Update bootstrap-slider.js
Update bootstrap-slider.js
Update bootstrap-slider.js
Update bootstrap-slider.js
Set responsive behaviour as default
Merge pull request #3 from zonia3000/master

Set responsive behaviour as default
Merge pull request #152 from zonia3000/patch-1

Added an option to have a responsive slider