Refactored `clearance` module

The clearance module has been jigged around a little - since there's been some name changes this might break some legacy code so, so it's been given a major version number bump.

A few other bug fixes included. Updated documentation being worked on...

What's Changed

• Add a .nojekyll file for docs builds and bump version by @jonnymaserati in #138
• Getting ready for documentation by @jonnymaserati in #139
• Fixed and refactored a little the clearance module by @jonnymaserati in #148

Full Changelog: v0.5.1...v0.7.0