Update datepicker source file

[denys281]

New version of datepicker is available.

bootstrap-datepicker

Change log
12/3/2013
Fixed bug where date selection from previous and next year was wrong
Fixed bug where a variable was polluting the namespace
10/3/2013
Changed so the value will not be set unless the user chooses a date
16/2/2013
Fixed it to work with Boostrap version 2.3.0 and jQuery 1.9.1
Added a new callback, 'onRender' to decorate or disabled specific dates
Added the option to disable specific dates
Fixed some bugs in the parser
Fixed some bugs in the formater