Essbasepy updated for Python 3

A huge number of updates and cleanups were put in to the Essbase Python wrapper (essbasepy) recently. These were all made by Github user Kevin (‘nurse’) who updated many sections of code, modernized a number of things, cleaned up comments, and more. The updates look substantial and if you are using Python 3 with this module, absolutely recommended.┬áCheck out the GitHub Essbasepy page for more.