OCD whitespace-only changes

Aligning comments, it{} blocks, remove trailing whitespace, and inserting
newlines between vars and include statements.
Re-order validate functions to match param order.
Make pre_conditions more prominent

These are more important than the params in these test contexts. So re-order
them to the top of the context and split them across multiple lines with a
HEREDOC so that they're easier to read.
Release 0.2.0
Merge pull request #13 from gds-operations/release_0.2.0

Release 0.2.0