Adds inline and width parameters to kayako-colorbox class

Allows users to specify an inline colorbox by inserting
a jQuery ID selector in the "target" attribute of an <a>
tag.

Allows users to set a specific width of a Kayako
colorbox by adding the class
kayako-colorbox-width-### to an <a> tag.
Merge branch 'kayako-colorbox'
Version 7.x-1.1.5