Use relative URLs for chooser

Fixes issue with choosers not working on HTTPS
Merge pull request #95 from md5/https-chooser

Fix choosers under HTTPS
Fixed #98
Restricted requests to /comments to html responses.
Layout bug with form labels.
Bugfix: image path was broken in new user email.
Added confirmed_observations_count to list csv exports.
Bugfix: layout of listed_taxa/show had a translation bug.
Added unconfirmed_observations_count to list csv export.
Made sure LocalPhotos get native_realname set when available.
Bugfix: not all places with boundaries have bbox_areas apparently.
Bugfix: project contributor stats were all showing the same stat.
Ignore .ruby-gemset and .ruby-version
Bugfix: FakeView.image_url wasn't working.
Bugfix: welcome email wasn't generating image path correctly.
Added ability to sort by date added to project.
Merge pull request #104 from md5/rb-gemset-version-ignore

Ignore .ruby-gemset and .ruby-version
Added observation field names to /observations/:id.json response.
Misc translations on mobile views.
minor changes