add scaffold for plan refs #1

bundle exec rails g scaffold plan \
  project:references \
  startedAt:datetime finishedAt:datetime \
  expect:integer actual:integer notes:text
jQuery & jQuery UI refs #1
update models for Plan refs #1
update controller & view for test plan refs #1
Remove view/request/helper spec refs #1
render 404 page when project parameter is missing and invalid refs #1
Merge pull request #2 from mzp/id/1

Add test plan view.