bug fix on setup.py: import pyvo for long description
fix version string format (thanks to keflavich)
Merge pull request #4 from RayPlante/migratetests

Change `vaopy` to `pyvo` in tests
bug fix: properly handle zero-results (SIAResults.__len__() effects bool(SIAResults))
Merge pull request #6 from RayPlante/recinit

bug fix: properly handle zero-results