Modified parser to conform to altered grammar definition.  Should fix 2.6/2.7.
Fixed lexer so it will tokenize '!=' properly.  Minor tweak to mytokenize() to avoid using print keyword (new issue).
Re-add bang to regular expression, and fix handler case to not just check the leading character of the operator.
Add rudimentary support and tests for AST-ification of my-statements.  Fix bug in handler for translation-less embedded expressions.