Code clean-up via ReSharper
Renamed private and public members for consistency with my other libraries

Also:
- Further code clean-up
- Marked TODOs in the code
- Fixed comments
Added note to Noise2D about its noiseutils equivalence
Referencing tutorial/samples project on README
Removed .Unity from the namespace

It was redundant, since it's not like someone is going to accidentally
import LibNoise.Python into their Unity project.
Expanded Select property documentation
Removed unnecessary backing fields from ScaleBias
Releasing LibNoise 1.3

This version does not contain any major API changes, but it does alter
the internal member naming conventions and expands the documentation.
Making a new release so that anyone downloading it is working from the
latest stable codebase.

Merge branch 'release/1.3'