[DOC] Include git-based version in conf.py (#173)
[DOC] Include git-based version in conf.py (#173)

Closes #172 by importing get_version from
_version.py into docs/conf.py.

Append the current directory of the conf.py file
to sys.path so we can import the versioneer script
and get our git-based release and version identifiers.

This gives us better information on the exact build,
and is one less thing to worry about when we do releases.
CORE-GATECH-GROUP/serpent-tools,CORE-GATECH-GROUP/serpent-tools