Added a callback for (re-)initialization

Signed-off-by: Joern Bernhardt <jb@campudus.com>
Added onInit callback, updated docs for callbacks

Signed-off-by: Joern Bernhardt <jb@campudus.com>
Clean up window bindings on destroy

Fixes gh-98
Merge pull request #99 from gseguin/destroy-cleanup

Clean up window event bindings on destroy
Merge branch 'on-reinit-callback' of https://github.com/campudus/slick into campudus-on-reinit-callback

Conflicts:
	README.markdown
	index.html
minification
Fix path to main endpoint of bower package (use slick.min.js)
Merge pull request #100 from benib/master

Fix path to main endpoint of bower package (use slick.min.js)
Changes bower jQuery dependency to greater-equal to 1.7
Merge pull request #101 from robharper/feature/bower-jquery-fix

Changes bower jQuery dependency >= 1.7