Updated the footer

Leaflet in the footer was hyperlinked to the older website which is currently not available. Updated to the current one.
Update
Add Gemfile and manage gem dependencies using bundler.
Move recaptcha require statement into config/initializers/recaptcha.rb.example.
Added the leaflet beta url
Deleted buffer files
Added the image upload control
Leaflet controls added to modify images
Added rotate and distort functionality, organized content
Added documentation
Synced the fork with the public lab fork
Merge branch 'master' of github.com:publiclab/mapknitter
sidebar banner tweak
Gemfile additions and environment.rb source_index fix to accommodate newer Rubygems (2.4.2)
running in 1.9.3, i think
gitkeeps
much of Rails 3.2 upgrade
no Gemfile.lock
added amazon aws
muchly working on rails 3.2!!!! still need to do openid schtuff