Added simple report for blood tests
Styled report headers
Fixed the tests I broke (through report addition)
Added link to report page from the blood tests page
Added CSS reset and appropriate accomodations
Filtered empty results from report page
Added helper to make checking for nil values more efficient
Added bars for displaying 'position' of out of range test values to the report
Added popups for range bar values
Merge branch 'feature/report' into develop

Conflicts:
	app/assets/stylesheets/blood_tests.css.scss
	app/views/blood_tests/index.html.erb
Fixed a couple of tests