Fix shapefile helper tests
Ignore test working dir
Fix some tests, make BaseTest, cleanup
Lots of misc cleanup

* Environment.Exit() calls replaced with ApplicationExceptions
* Fix minor bug in Shapefilehelper
* Change locations of config files
Update config files, remove autogened configs
Fix counties for new tiger files
Fix unit tests
Remove county/subdivision support
Remove stale gitignores
Add missing nsis dependencies
Update nsis installer to ignore old configs
Merge pull request #27 from azavea/topic/cleanup

Topic/cleanup