Fixed minor parsing error for invoke statements
Fixed minor error - lexer was not accepting logical or operator
Added very initial langauge spec document.
Merge remote-tracking branch 'upstream/master'
Merge pull request #4 from DanielJCampbell/master

Fixed minor errors
Merge branch 'master' of https://github.com/DavePearce/Wyscript
Pulling through Dave's changes
Added 2 more tests. now cleaning up kernel runner