Label behaviour + 'refresh' improvement + minor fixes

• 'refresh' method now updates only '.dk_options_inner', so the options
may be refreshed even with the dropdown opened
• Clicking a label now focus the respective select dropkick
• Abillity to set a placeholder that is hidden from the options by
setting 'disabled selected' to the first select option
• Corrects border-radius when the dropkick opens on top by adding
'.dk_open_top' class to container []
• This version of DropKick was tested and confirmed that works with
jQuery 1.7+
Forget to re-setCurrent option after refresh

• Adjusts refresh method
Type-to-change bug fix for WebKit.
Merge from upstream
Improves label behaviour

• Desktop browsers will fire the focus event on the dropkick container
referenced by the label
• Mobile browsers, when nativeMobile option is true, remains with it's
native behaviour
Add autoWidth default

Added autoWidth property to the defaults. This will allow for more granular control of the menu width. In particular when using percentage widths such as in responsive layouts. Utilizing inner options to set list items to overflow:hidden and/or whitespace:nowrap may be desirable as a solution when side scrolling is not desired and the items are wider than menu width.
Added support for dk_open_top and dk_open_bottom classes in preference to manually calculating out the position inline
Added support for dk_open_top and dk_open_bottom classes in preference to manually calculating out the position inline
Merge branch 'master' of https://github.com/adambullmer/DropKick

Conflicts:
	jquery.dropkick.js
Fixed merge conflicts
adambullmer PR
Merge branch 'morsecoding-master' into version-1.4
Merge branch 'master' of github.com:ExistentialEnso/DropKick into ExistentialEnso-master
Merge branch 'ExistentialEnso-master' into version-1.4
fixed merge conflict
Fixed merge conflict
Merged in last PR for 1.4
Style sheet changes and version number change in file
Updated readme to reflect 1.4 changes
Added bower.json and more CSS cleanup
Merge branch 'version-1.4' of https://github.com/Robdel12/DropKick into version-1.4