Fix docs
Fixed spelling errors
Merge pull request #444 from damnyankee/master

Spell check

Closes #443
Remove DRB server / spork integration. Closes #358
Fix some legacy features #408
Ensure legacy_features are run by default #408

I'm commiting this into master, even though I know it
will break the build, because we should have had this
running all along. We should not release code from master
without checking each of these failures.
Improve assertions feature
Improve getting started feature
Improve background feature
Simplify features
Organise features into folders
Strict build so it fails on undefined steps
Create new_file.txt