Update patient export features

#### Stories ####
- https://www.pivotaltracker.com/story/show/66688288
  - patient export should not export based on all the measures
- https://www.pivotaltracker.com/story/show/66955040
  - remove unused collections from db reset
- https://www.pivotaltracker.com/story/show/66689010
  - move export button to be next to the test patients label

#### Notes ####
- retrieve current measure via <code>hqmf_set_id</code> and scoped by current user
- updated <code>rake bonnie:db:reset</code> to drop <code>patient_cache</code>, <code>query_cache</code>, <code>measures</code>, and <code>bundles</code> collections after copying
- added patients settings to the Test Patients header in measure view, updated styling to matched measure title bar

#### Screenshots ####
- updated measure view
  - ![patientssettings](https://f.cloud.github.com/assets/456952/2336128/923c8ae6-a48b-11e3-92e4-197eef2c86ae.png)
- patients settings expanded
  - ![patientssettingsexpanded](https://f.cloud.github.com/assets/456952/2336129/9240471c-a48b-11e3-996d-66cab63a1063.png)