Measure two-step delete, with sliding 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 sliding animation for buttons

#### Images ####
##### No wrapping #####
![no-wrap-one](https://f.cloud.github.com/assets/456952/2003155/ba5faf3c-8634-11e3-9d80-d4b59c7c7b88.png)
![no-wrap-two](https://f.cloud.github.com/assets/456952/2003157/ba613334-8634-11e3-9f46-d22c0993932e.png)
![no-wrap-three](https://f.cloud.github.com/assets/456952/2003156/ba5fb04a-8634-11e3-8ab4-b24174dd2863.png)
##### Wrapping #####
![wrap-one](https://f.cloud.github.com/assets/456952/2003158/bf819390-8634-11e3-8b85-33e2c762e012.png)
![wrap-two](https://f.cloud.github.com/assets/456952/2003160/bf825992-8634-11e3-99f3-a58bf1b3c3ae.png)
![wrap-three](https://f.cloud.github.com/assets/456952/2003159/bf82409c-8634-11e3-9e89-a436d0c2df6f.png)