add. For all test envs run tests in sartoris/tests/sartoris.py via nosetests.

Change-Id: I015b58c9db9eeb8998e26143600fdaf56714bc26
fix. add envs to tox.ini to run unit tests in python2.6/7 environments.

Change-Id: If59a17bdcb405c875895e59302da8bb82d7552ee
mod. name change to test.py to avoid package name conflict.  Imeplemented unit tests in TestSartorisInit.

Change-Id: Ie0289a6ce8929045aa2a2eea73c2162e0e4dc0bd
rm.  redundant imports.

Change-Id: Ib0575a5f3006c2f8bcf34b424bde5ef7e27f36c7
fix. reference to _tag and call to attribute in sync and resync methods.

Change-Id: I2481f810b823dcac3eed7566a397542b42ca9c6e
mod. remove py26 env (argparse >= py27). Nose call to test.py.

Change-Id: Ibd94578df827750d81df9e9ad592eec8b861b4b3