The test had a check for a pandas version (0.12.0) which was out of date
with the version in requirements, meaning the tests have not been run
regularly and unstable.
Skip via the decorator to make it more noticeable that tests are not
being run.
on the number of per-tick update that occur since they were duplicated
per each PerformancePeriod. Also opens up the path to cythonizing the
entire object
Now version testing will only be run if the pandas version is
current. This is to allow the test matrix to pass on travis.
The version must be updated in file whenever pandas is upgraded.
Eddie Hebert