fix problem for BS3 modal

If you add input in modal datepicker show under modal shadow layer.
Set 'appendTo' for fix this problem, eg.:
<pre>
$('.datepicker-input').datepicker({
	appendTO: "div.modal"
});
</pre>
Removed blank space before the previous button when calendarWeeks is true;
Fixed calendar-weeks.js test;
z-index calculation should not stop at first element

i guess that when calculating proper z-index for the datepicker, we should find the max z-index value of parents() and not stop at first

related to #533 #170 #683 #678 #656 #665 #634 #621 #609
indent formating
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oops forgot one line
Better translation
fix ch global leak

Maybe you should use jshint or smtg to detect globals easily.
Return the return value for aliased methods
Reconcile autoclose with refocus

Closes #731
fixing the ui displaying 'undefined nan' when typing dates in firefox
Merge patch request 733 from vvo/patch-1

fix ch global leak
Add datepicker3.css to main assets for bower/composer
Removed comment from compiled CSS.

Block comments are passed through into the compiled CSS, while line
comments are not. It seems appropriate to not pass commented styles
into the compiled CSS.

Conflicts:
	css/datepicker.css
Removed unused .dow styles.
Revert spacebar hijacking; merge functionality with enter
Adding "clear" translation to italian file
Merge branch 'master' of https://github.com/eternicode/bootstrap-datepicker into vietnamese-translation
Merge pull request #730 from anvoz/vietnamese-translation

Better Vietnamese translation