Minor doc fixes from gregorio.bastardo
Merge pull request #277 from joshmoore/gregorio-doc-fixes

Minor doc fixes from gregorio.bastardo
Now it is easier to disable extended precision float support (see gh-275)
Merge remote-tracking branch 'upstream/develop' into develop
Distribute/setuptools issue with cythonization seems to be fixed
Do not use reserved names as identifiers
Final fixes to refactorization of tests for extended float support