Added new layout to the measure view

- Changed measure.hbs to use the new layout
- Removed unused elements in measure_calculation.hbs
- Added popover hooks to measure_view.js.coffee
- Added popover styles to bootstrap3.less
- Removed redundant styles in builder.less
- Added measure page styles to measure.less
- Added mixins.less with a shared class
- Remove title-bar class from measures.less and moved to mixins.less
Fixed small styles issue created by pulling.