warn about unresolved identifiers
properly handle embedded anonymous structs in identifier resolution
preliminary custom type resolution
deal with []byte as special case
make new Elem type for Map
map templates
now w/ map[string]T
some cleanup, etc.
note that interface{} is still incomplete
Read/WriteTime
Merge pull request #10 from philhofer/ident

Type lowering and map[string]ArbitraryType - fixes #3