update README, reprioritize tasks
Begin working on Result/ResultType/ResultSet - not used yet.

This adds a dependency on the enum34 package.
Rework arg handling:

Move instance methods from runner to runner.args and move
as much validation of the args into arg parser as possible.
make --status-format default to STATUS_FORMAT in the env
start using TestSets
linting
add go wrapper to top level of repo