fixed issue 750 (Z in date parsing) and added test
final touches for 1.5.2
using jquery 1.7, latest jquery ui, and fixed dragging bug (issue 1168)
updated version and changelog for v1.5.3
upgraded to jQuery 1.7.1 and jQuery UI 1.8.17
fixed changelog and code comments for v1.5.3
fix typo in explanation of _fixUIEvent
replace curCSS with css for jQuery 1.8
Merge pull request #61 from archaeron/patch-1

replace curCSS with css for jQuery 1.8
bundle jQuery 1.8.1 and jQuery UI 1.8.23
change version to 1.5.4
update changelog