v0.2.3

SPIDEROSM VERSION HISTORY
v0.2.3  fixed colspecs.py to handle promotions to BIGINT properly for type long.  
v0.2.2  removed ez_setup.py from MAINIFEST.in
v0.2.1  changed 'imposm' requirment to 'imposm.parser' so psycopg2 not needed!
v0.2.0  installs with setuptools, registered with PyPI  '%pip install
spiderosm' now works.
v0.1.1  added back missing test file!
v0.1.0  now a python package, match_* code refactored to match.py, toplevels
in bin/, testing cleaned up and spider_test toplevel added, optional database
modules cleaned up. 
v0.0.4  fixed problem reading pnwks with non-ascii property keys. (Switched to
json.load() until geojson.load() fixed.)
v0.0.3  removed spatialite dependency from match_portland.py, slight improvements to README.
v0.0.2  added match_portland.py top level, modified centerline.py to discard any z-coordinates in input.
v0.0.1  fixed osm pnwk jct attribution problem.  first github version
v0.0.0  emailed to mapbox  (not on github)

