Improve API documentation section

Improves clarity and detail around the API section of the admittance docs

Documentation updates

Updates documentation from v3.0.0 to v4.0.0 level
The main change is that examples and docs show new multiple instance usage of admittance

Multiple Admittance instances

This major release makes it possible to create multiple instances of admittance by exposing a function that when called returns an instance

Permissions refactor

Refactors permissions structure into 2 objects. A permissions object and an assignment object

Documentation improvements

v2.1.6

Rev version to 2.1.6

Improved test coverage and documentation

v2.1.3

Rev version to 2.1.3

Permissions hierarchies

Hierarchies of permissions can now be defined to make building out application permission structures more betterer

Fix and validate package.json file

Prepares package for release on npm by updating package.json file and validating

V2 Documentation and code quality release

Change log:

• Added documentation
• Added travis CI
• Added coveralls analysis
• Example file fixes

Version 2 of Admittance

Rewrite of the module with a totally different and simpler interface.