Remove privacy_vouched_by.
[fix bug 931359] Display list of vouchees on profile page.

 * Display list of vouchees on profile respecting profile privacy of
   each vouchee
 * Cleanup h-card support
 * Add .profile-entry to tag each profile entry.

Credits for ideas and previous work to
 - https://mozillians.org/en-US/u/bharath/
 - https://mozillians.org/en-US/u/jarekps/
[fix bug 944798] Converted all <legend> to <h2> in profile edit section
Merge pull request #950 from anushbmx/master

[fix bug 944798] Converted all <legend> to <h2> in profile edit section
Merge pull request #942 from glogiotatidis/profilesprivacy

List of vouchees.
Remove unused JS files.

 * underscore.js
 * profiles.js
 * Update tagit code for skills.