First version of schemer.
A lot of big changes to the way schemer works.  The schema model is a lot more sensible now.  Still a bit of work to do.
Some fixes to map.  One more test added to check default values.
Tidied up the API a bit.
A lot of bugfixes and some streamlining of the interface.
Merge branch 'master' of github.com:muhrin/schemer