Import current melbourne specs and tag failing
Fix problem with +=; now passing defined_spec and str_spec

--HG--
extra : amend_source : ea9fdeac0ebbef7fa5ae474ff04cae3856304699
Fix %i and %I; now passing array_spec
Implement case and when; Now passes case_spec except where splats are involved
Add "clumping" to dstr processing; now passes dstr_spec
Started implementing masgn
Merge