python: add old python 2 package back

According to PEP394 (http://legacy.python.org/dev/peps/pep-0394/)
the 'python' command should refer to 'python2'.

In our case, this means we should reboot the old python package.

We could rename the package name to python2, but that would
just complicate things a bit with other packages, and
since we're doing this reboot, such a complication would be
unnecessary.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>
python: move python package versioning to python-package.mk

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>
python: enforce version assignment

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>
python: include python*-package.mk irespective of DUMP env var

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>
python: use  command instead of 'ln -sf'
python: add python2 symlink to python as per PEP394
python: upgrade to version 2.7.8
Merge pull request #429 from commodo/python-respin

Python respin