remove uneeded default args to projection ctor (also fixes msvc linking)
Merge pull request #1722 from mapnik/projection-ctor-fix

Projection ctor fix
also clean up pyc files - helps avoid debian packaging issues
Merge branch 'master' of github.com:mapnik/mapnik
Merge branch 'master' of github.com:mapnik/mapnik into fix-rule-cache
add support for background-image to cairo_renderer and refactor into setup function to match agg/grid renderers - closes #1724
simplify scale_denominator interface
Merge branch 'master' of github.com:mapnik/mapnik into fix-rule-cache