Safe reader.
Parser adds line and col to clojure metadata
WIP: Location in metas
Transfer of line/col to stencil metas, passes basic tests.
WIP: Meta for every atom; passes transforms, does not compile.
Metas after every entity.
Pretty-print no long depends on transform.  Agumented so pprint options for debeugging.
WIP: Meta sanity (metas everywhere...until emit and then nowhere)
WIP: Metas everywhere continues...
Meta after every token working; Line-number reported in (some) error messages.
No longer stops pprinter when false is in the list.
Fixed python importing; removed literal from runtime meta.
Renders properly through py-bokeh.