[fix bug 997678] Add date_joined and last_login to UserProfile admin.
Merge pull request #907 from glogiotatidis/997678

[fix bug 997678] Add date_joined and last_login to UserProfile admin.
Fix broken links in docs
Added note about node version issues for less.
Merge pull request #917 from chefscott/doc_edit

Added note about node version issues for less.
Merge pull request #918 from hoosteeno/master

Fix broken links in docs
Merge branch 'master' of git://github.com/mozilla/mozillians into my_branch