Add column headers to result table

This version does not support sorting on column headers yet
Add styling for unsortable columns and apply to condensed flag column
Require view in the header and table to enable modification for sorting
Add data-concept-id attributes to column headers
Remove unnecessary requirement
Ignore pointer events on table header cell children
Enable sorting on result table by clicking on column headers
Remove logging statements
Use javascript over pointer-events to ignore header element clicks
Merge pull request #43 from cbmi/issue-30

Add column headers and enable sorting on results table