Automatic build (travis) and deploy binaries to package manager

[thclark]

Build app and python bindings for the matrix:

OS:

• OSX (darwin)
• Windows (64)
• NB linux builds not required for AURA project so add later

Frameworks:

• Python 3.6. 3.7

Doc build:

• Python 2.7

The build should be:

• hooked to GITHUB release tags Put onto S3 to allow preparation of a full release from multiple different builds
• set up to attach binaries into the /lib folder of the release
• arrange header file with the public API into /include
• deploy to vcpkg https://docs.microsoft.com/en-us/cpp/build/vcpkg?view=vs-2019 or conan
• set up to include the third party libraries. NB will need to include libceres for windows.

Note this library shows how the final package releases should look:
https://github.com/djungelorm/sphinx-tabs/releases