Avoid hangs in full builds

SBT seems to hang when forking to run tests for projects with an empty
test suite.  To remedy this, I override the 'fork in test' setting to be
false for those projects.
Use SBT cross-version syntax instead of hardcoding scala version
Pruning in geometry package
Spruce up projection module a bit.
Get things compiling again
More compile errors
Add utilities for creating features
Remove GeoHash from the GeoScript library
Add more scaladoc comments
Fixes to allow feature.builder to actually run
Use implicits rather than wrapper for Layer also
Remove GeoHashTest too!
Bring Layer and Workspace up to the new style
Merge branch 'scala-2.10' of github.com:dwins/geoscript.scala into scala-2.10

Conflicts:
	project/Build.scala