adding ability to obtain patient level calculation results for any given patient outside the scope of a calculation report query.
Merge branch 'add_patient_results'

Rebasing and merging pull request #78
updating hds dependency, fixing debugger dependencies for travis
moved mocha and unicorn into ci group in gemfile
Merge branch 'gemfile_cleanup'

Rebasing and merging pull request #79
set selected_measure_ids to [] if it's set to nil

This works around a rails bug; see https://github.com/rails/rails/issues/8832 for more details
Merge branch 'denullify_selected_measure_id_prefs'

Rebasing and merging pull request #80