Comments, Whitespace and Type hinting

Commented each function, it's parameters and return type.
Additional whitespace where appropriate
Removed checks for a function being an array as the type hinting will solve that issue.
Update README.md

Fixed OR-ing Filters to add in the missing array.
remove old tests
get_one optimization
Raw SQL pass-through #2
Remove commented-out code
Select across models. Closes #3
Bump version number to 0.1.4
Merge branch 'release-0.1.4'