Add support for /proc/self/cgroup files (found on multi distros)

The file /proc/self/cgroup is present on the following tested
distros: Arch, Fedora 21, CentOS 7, Mageia 4, and Slackware 14.
This update added a handler to parse files with the name/format,
test data (and JSON/CSV files) for verification scripts, and a
recreator for raw->parsed->raw testing.
Merge branch 'master' of github.com:/cnamejj/PyProc