Fixed swiping issues

- Error when stopping or playing slides when controls are not generated.
- Fixed issues with the vertical swiping detection.
Removed dependency on Modernizr

- Added built in css feature checks in case Modernizr is not present.
- Removed the local modernizr and jquery files.
- Moved all demo files to a single folder
Added "jsFixHeights" option

Use javascript to force slides to have the same height.