jQuery UI dependency updated to '1.8.17 - 1.10.4'

Fullcalendar is not ready for jQuery ui 1.11.0 (released on 2014-06-26) so I've updated the dependencies to match jquery ui `1.8.17 - 1.10.4`

You could consider fixing all these things and move the dependency up to 1.11.0 but the [upgrade guide](http://jqueryui.com/upgrade-guide/1.11/) is quite big so it might take developers some time to update their jQueryUI versions.

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I ran in these issues while building with 1.11.0, there might be other problems as well:

generateLanguages.js, 'jquery.ui' prefix should be removed from line 151

	var path = config.datepicker + '/jquery.ui.datepicker-' + datepickerLangCode + '.js';

Gruntfile, not in these locations any more:

	'lib/jquery-ui/ui/minified/jquery.ui.core.min.js',
	'lib/jquery-ui/ui/minified/jquery.ui.widget.min.js',
	'lib/jquery-ui/ui/minified/jquery.ui.mouse.min.js',
	'lib/jquery-ui/ui/minified/jquery.ui.draggable.min.js',
	'lib/jquery-ui/ui/minified/jquery.ui.resizable.min.js'
        'lib/jquery-ui/ui/jquery-ui.js'

karma.conf.js, jquery-ui.js moved one folder up on line 25

	'../lib/jquery-ui/ui/jquery-ui.js',