Add testIncludes and testExcludes parameters

These parameters support more robust testing, particularly to unit test
executables by excluding the main routine and including a test main
routine. Preserve the previous behavior whenever testIncludes and
testExcludes are not specified.
Copy test resources to the test working directory
NarTestMojo: fix whitespace
Merge branch 'more-testing'

I added a testIncludes and testExcludes parameter to support more robust
testing, particularly to unit test executables by excluding the main
routine and including a test main routine. I preserved the previous
behavior whenever testIncludes and testExcludes are not specified.

I added a test resource directory and copy all files within it into the
test working directory. I use it to move a log4cxx properties file into
place for better test log output and recording.

This resolves PR #23.