JBasic 1.7-1 offers bug fixes, new syntax elements

This is mostly a bug-fix release. See the change log for details. Major areas of bug-fixing include:

1. Improved error detection and reporting during compile
phase.

2. Recursive JBasic programs now work correctly.

3. FOR .. EACH syntax allows index to loop over a list of values
or array elements. FOR..DO allows one-line loops, even in
command line mode.

4. New data type declaration statements like INTEGER and
STRING make programs more self-documenting.