Source files can now be in multiple directories.
Added tests to check multiple directory functionality.
Moved to python2.7
Multiple directories can now be referenced in a simple way.
Added a script to build all C++ tests using both static and dynamic
linking.
Updated BUILD files to match new format.
Cleaned up cc.py.
Cleaned up jbuild.py
Reindented the files to 4 spaces.
Merge branch 'unstable'