Tauola114 6 2 x

This request is for adding Tauola++ 1.1.4 and TauSpinner (ported from 5_3_X). This request is linked to cmsdist pull request #512. 
This pull includes:
TauSpinnerInterface Plugin based on Tauola++ 1.1.14 TauSpinner
python/ and test/ scripts for TauSpinner
Modified TauolappInterface to allow additional features from Tauola++ 1.1.4 and to allow for changes in the directory structure of Tauola. Allow additional plugin for Tauola++ 1.1.4 without changing the default Tauola.
Ian