Updated to work on Ubuntu linux

• MySmallBasic is now working on Ubunut linux.
• But still have an issue in the debugger.

Fixed some bugs

• Fixed a bug in the debugger (showing array values properly after changing the array structure)
• Added a CTS suite
• Fixed a font problem in Text controls
• Merged Facebook/Database APIs

A bug fix on the lexer and some improvements on error messages

1. Fixed a bug on the lexer mishandling a missing double quote.
2. Revised exception handling in TextWindow using jansi library.
3. Created two small basic for regression test on exception handling.

The 1st release for the computational thinking course

Happy MySmallBasic!!!