Optimize initial rendering methods and related code. Fixes #566
Fix disable method for unrendered tooltips. Fixes #565
Improved tip drawing and adjustment code. Fixes border issues with large tips.
Fix SVG variable declaration issue.
Remove redundant method
Fix some mouse positioning issues
Make modal zindex base visible on $.fn.qtip object
Fixup modal.js references to old $.fn.qtip.modal.zindex property change in last commit
. Fixes #568
Fix intCss() in Tips to take care of float value

It fixes a bug on border width calcul in Tips when there is a browser zoom.

To reproduce the bug, you have to zoom + the page BEFORE the tooltip is generated.
Fix nondelcared variable issue.. Fixes 569
Merge pull request #570 from raphaelMalie/patch-1

Fix intCss() in Tips to take care of float value