Add package to conda-forge

[chrisleaman]

It'd be nice to be able to conda install -c conda-forge py-wave-runup as most of the my environment setup is based around conda. Look into adding this package to conda-forge

[chrisleaman]

References:

• https://levelup.gitconnected.com/publishing-your-python-package-on-conda-and-conda-forge-309a405740cf
• https://levelup.gitconnected.com/continuous-deployment-with-travis-and-conda-f385fec1a3f
• https://gist.github.com/zshaheen/fe76d1507839ed6fbfbccef6b9c13ed9