Initial implementation of Web SQL API and a test HTML page
Made html example to be interactive
some tests work
Added proper exception firing and callbacks calling
Added saving of the database in localStorage
Multiple fixes

- Added types conversion
- Fixed exceptions throwing
- Added transaction rollback on error
Wrapped API definition in closure
Added support of the rowsAffected and insertId attributes; Fixed successCallback to be called asynchrhronously
totalChanges() optimizations
openDatabase is exported as purejsOpenDatabase
FireFox fixes
Added MIT license header and README.md file