Add CSS tooltips to display the INFO attribute description from the VCF
Tooltips: fix bugs, improve styling, add info type
Improve styling of affordances and hover behavior
Add PropTypes to new components
Merge branch 'feature_35_examine_page_add_affordance_and_tool_tips_to_cols'

Conflicts:
	cycledash/static/js/examine/ExaminePage.js

Resolved by setting header as a prop of examine in the XHR