- remove atlas_depend_on_subdirs
- minimize ROOT component dependencies
- update link dependencies

Use `Python_.*` variables instead of the non-standard `PYTHON_.*`.

Replace `PythonLibs` and `PythonInterp` to the corresponding
`find_package( Python ... )` calls. And remove the dependency entirely
where not necessary.

Enable flake8 for all python modules and make them compliant.

Get iteritems from six.
Use PyCapsule instead of the deprecated PyCObject.
Use RootUtils::PyGetString.

Update for headers moved from SGTools to AthenaKernel.

Instead of re-listing the library dependencies for the component
library, simply link against the installed library.


Former-commit-id: b09f4639

	* Tagging AthenaPython-00-07-01.
	* Use unordered_map from STL rather than from CxxUtils.


Former-commit-id: 529bff04

2015-10-04  scott snyder  <snyder@bnl.gov>

        * Tagging AthenaPython-00-06-44.
	* Comply with ATLAS naming conventions.

2015-05-19  scott snyder  <snyder@bnl.gov>

        * Tagging AthenaPython-00-06-43.
	* python/FilePeekerLib.py: Fix for compatibility with gcc5 ABI.

2015-04-22  Alexandre Vaniachine  <vaniachine@anl.gov>

        * Tagging AthenaPython-00-06-42
        * python/FilePeekerLib.py: fix ATEAM-142: no AtlasRelease overwrite

2015-03-03  Alexandre Vaniachine  <vaniachine@anl.gov>

        * Tagging AthenaPython-00-06-41
        * python/FilePeekerLib.py: Peeking for eventless MC DAOD files