NESTCollaboration/nestpy: nestpy v1.3.3 NEST v2.1.2

See nest v2.1.2 for full physics features. Significant function changes: testNEST --> execNEST (renamed function) Vectorized yields functions in helpers module (for fast python implementation) New nestpy features: New free parameters registered Cases of void initialization in tests fixed Introduced files for debugging tests as we improve code Prepared for NEST v.2.2 release. Solved half of GetS1 and GetS2 issues opened in #3