Various fixes to restore default behaviour after John's new features

This release fixes Bug #28 - various problems with backwards compatibility after John's enhancements.

• Added GPL v2 licence file
• Fixed default URL for options.submit
• Moved options.sorted into a global gSorted array (it wasn't an option!)
• gTableWidth now a global array
• Added an error alert if sequences[displayOrder[i]] not defined
• Fixed default behaviour for clicking on IDs