Fix bug in OpenCG compatibility module

Add Bryan Herman to release notes

Fix hyperlink in documentation

Incremented version number to 0.6.2 and added release notes

Change sys.path.append to sys.path.insert in results.py for each test.

Merge branch 'release-0.6.0'

Bumped version number to 0.6.0.

Merge branch 'release-v0.5.4'

Update description of <lattice> in user's guide.

Version 0.5.2