gofmt.sh: include prefix when printing corrected files
token: move into it's own subpackage

Signed-off-by: Alejandro Mery <amery@geeks.cl>
token: make Token parts public

Signed-off-by: Alejandro Mery <amery@geeks.cl>
token: made TokenType constants public and rename tokenNL to tokenEOL

Signed-off-by: Alejandro Mery <amery@geeks.cl>
lexer: WIP - merely splitting lines for now

Signed-off-by: Alejandro Mery <amery@geeks.cl>