Measure two-step delete, with fade-in buttons

#### Story ####
  - https://www.pivotaltracker.com/story/show/62487888

#### Notes ####
  - Replaced measure's delete button with consistent two-step delete button used within patient results and patient data criteria, moved measure settings gear icon into title bar
  - Updated styling to match v5 mockups
  - Added simple CSS3 fading transition for buttons

#### Images ####
![screen shot 2014-02-07 at 8 45 58 am](https://f.cloud.github.com/assets/456952/2110170/4a6cffee-8ffe-11e3-8ced-79e672c618fd.png)
![screen shot 2014-02-07 at 8 46 06 am](https://f.cloud.github.com/assets/456952/2110171/4a6de102-8ffe-11e3-91a5-817a1d765a93.png)
![screen shot 2014-02-07 at 8 46 12 am](https://f.cloud.github.com/assets/456952/2110172/4a6e237e-8ffe-11e3-9532-81ab6ce4bc31.png)