Refactored CMakeLists.txt to better support a workflow that treats nupic.core as an external library.  Renames src/main to src/nta.
Move src/main/algorithms/Connections.* -> src/nta/algorithms/
Don't attempt to overwrite original libnupic_core.a
Include combined libnupic_core.a static lib
Merge remote-tracking branch 'upstream/master' into cmake-cleanup
Include new Connections structure
Added settings to support `make package` binary tarball release.
Merge pull request #228 from oxtopus/cmake-cleanup

Refactored CMakeLists.txt to better support a workflow that treats nupic.core as an external library.