Production push: planting reminders, crop details, harvest photos, finished plantings, etc

Features:
* Support for alternate names for crops was added. Look for search to come soon.
* Added many tomato varieties
* When you mention a crop in a post, that post shows on the crop page
* We will soon be sending reminder emails to update your plantings
* You can post photos of your harvests as you record them
* You can now mark a planting as "finished" and give it a date for that
* Member profile pages have had a visual refresh

Bugfixes:
* You can now go up to a month before you have to log in again
* Fixed an issue with selecting a set/album from Flickr
* Fixed a Markdown-related bug with linking to crops and external links in posts

Other:
* Created backend infrastructure for localised/translated versions of the website
* Moved to Ruby 2.1.2
* Improved code generation with "rails g scaffold"