Added BootstrapValidator.

Reformatted a few lines to match pep8 styling according to PyCharm.

setuptools.command.sdist.READMES may not always exist, using getattr and setattr instead.

Added testcov command line option/command in setup.py.

Moved template test fixture into conftest.py. Fixed shadowing variable name.
Forgot to update macros.html.

Added a note in __init__.py docstring.
Merge pull request #1 from Robpol86/bv

Added BootstrapValidator.