v1.5.0 - Forth 2012 core standard compliant

2016-01-04: v1.5.0 - Forth 2012 core standard compliant!

• forth: made +loop work according to standard
• forth: added support for #, $, %, char parsing. e.g. #123, $d020, %1001001, 'z'
• forth: ' now aborts if it does not find a word
• forth: made "type" disable c64 quote mode (fixes "words")
• forth: state ( -- flag ) changed to state ( -- addr )
• forth: added count, >body, <#, #>, hold, sign, #, #s, >number, move, accept
• forth: removed hide, hide-to, hidden, forget, scratch, cmove, cmove>
• forth: fixed yet another tail call elimination crash
• forth: made while/repeat implementation conform to standard
• forth: made word conform to standard
• forth: made "immediate", "no-tce" non-immediate
• forth: made sure immediate does not toggle

Thanks to polluks for suggestions!