Remove redundant code/files

[jdha]

• [x] DOCS
• [x] test_scripts
• [x] .travis.yml

[rdPatmore]

I will remove test_scripts. I will create a #115 branch for it.

[jdha]

@rdPatmore you may as well go through the other bits on the list too

[jdha]

@rdPatmore here's one more old dir: conda-recipe

just noticed @jpolton was updating it, but it has no purpose in the repo now we've updated the structure