Fix to test classes

Updated test classes to run correctly from folders other than the test root.

Altered coverage to correctly upload.

No functional changes to the library.

Initial Twine() class and test framework

Twine class with a basic twine schema, and set of tests covering:

• Loading and validation of twines by the Twine class
• Operation and exception management with broken twines
• Test cases covering valid and invalid twines, especially credentials and children sections

Draft data framework in docs

0.0.4

VER Version bump for the extended documentation

Documentation improvements

0.0.3

VER Version history for 0.0.x

Initial release

Basis release with library framework in place. Docs building and deploying, CI in place on travis, and deployed to pypi.