Removed some experimental things from master.
Removed old examples from master.
Add .gitignore and PDF version of User's Guide.
Fix issue with Sage 5.6: SAGE_TMP is a Lazy String, so needs converting to unicode.
User's Guide update.
Allow Q' matrices to be 0x0. (See ff84 example.)
More examples.
Added a types argument to __init__ to specify a whitelisted set of types to use. Also convert tabs to spaces.
PEP8 things.
PEP8.
PEP8 and PyCharm inspection changes.
Examples updates.
PEP8 changes.
PEP8 changes.
Add new stand-alone script for verifying certificates.