Include namespace in of identifiers.
Fix writer so that it preserves namespaces correctly.
Update invalid tests that assumed namespace is ignored.
Write namespaces support tests.
Fix namespaces support on keywords.
Write tests for namespaces support on keywords.
Treat js namespace specially.
Merge branch 'experiment/ns' into macro-imports
Merge pull request #103 from Gozala/experiment/ns

Implement proper namespace support
Merge remote-tracking branch 'origin/master' into macro-imports