Update license and contact information.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
Correct indentation in symbol table.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
Add support for G

G is supported both as a pre-initialized variable and as a post-fix
quantifier.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>