Refactored CMakeLists.txt to use nupic.core as an external library and not require direct access to the source repository
Updated nupic.core

Conflicts:
	.nupic_modules
Update nupic.core to version that includes the right .a

Conflicts:
	.nupic_modules
Specify python lib during install
Remove find_package(PythonLibs ...) which was resulting in a conflicting version being found
Fixup Dockerfile to remove redundant build, and develop steps as well as use correct WORKDIR value
Merge remote-tracking branch 'upstream/master' into cmake-cleanup
Merge pull request #1519 from oxtopus/cmake-cleanup

Refactored CMakeLists.txt to use nupic.core as an external library