Gem cleanup:

remove gemspec
don't gem install bundler, list it as dependency
remove bundler/setup from hobson bin
remove unused gems: SystemTimer, childprocess, json, simplecov
Use fork of example_hobson_project
Fix encoding
Removed rspec rake task since it doesn't seem to work properly on travis
Remove selector with no styles
Remove unused require
Remove unnecessary method
Rename improperly named scenarios
Do pending specs
Refactor workspace:

Use Open3 instead of popen4
Remove rvm init (it should inherit rvm/rbenv from calling environment)
Refactor way workspaces are prepared (no longer uses stash business)
Merge fork_and_execute functionality into execute
Use Open3 when fetching hostname. Open3 will call Process.detach, so the curl process cannot become a zombie.
Use new process group when executing commands so that they can be killed as one.
Fix intermittent 404 with requesting public_url from AWS immediately after creating a file
Add "jobs per test run" to Hobson config and add a default config
Bump to version 0.0.2