Shingle

Main changes:
- Solid release passing in all ten build environments
- Fixes Docker build environments to pick up correct repository, branch and tag information

Main changes:
- Docker build environments now independent of repository and branch

Main changes:
- Restored and expanded wide-ranging test build environment
- Includes testing on macOs
- High Sierra 10.13
- Builds and tests in Docker Ubuntu images with Long Term Support (LTS) versions:
- Bionic 18.04 LTS
- Xenial 16.04 LTS
- Trusty 14.04 LTS
- Ubuntu Travis test environments with dependencies sourced from apt where possible for:
- Xenial 16.04 LTS
- Trusty 14.04 LTS
- Precise 12.04 LTS
- Ubuntu Travis test environments with dependencies sourced from pip for:
- Xenial 16.04 LTS
- Trusty 14.04 LTS
- Precise 12.04 LTS

Main changes:
- Include metric python functions.
- Previous shapefile tests added back to test suite.
- Expand out shapefile and boundary processing.
- Diverse new metric test cases.
- Introduces Tag class and code to read and modify brml tags.
- New Caribbean test cases.

Main changes:
- Populate tags in test cases, to enable selective testing.
- Automated online continuous verification testing now considers all tests with the tag 'continuous'.
- General improvements to clean and streamline library.

Merge of the simplify_build feature branch, to fix 2 and generally make the setuptools build more agnostic and the dominant build over the configure--make route 9since there is C++ code to include).

Main changes:
- Extends methods to build the library.
- Enable setuptools to build all dependencies (including now all spud C++ code and symbols, eliminating an intermediary static library) - to fix issue 2 .
- Relaxes enforcement of flat namespace flag.
- Move local Docker container testing online, covering 3 Ubuntu LTS systems.
- Expands testing online to cover 3 Ubuntu LTS systems, both apt-based and pip-based dependency installs.
- Package name fixes.
- Eliminates initial data downloads.
- Scientific fixes for Trusty available on Travis.
- Various other Travis fixes to support concurrent build testing.

*Refer to discussion in 2 for further details.*