Merge pull request #264 from Growstuff/dev

Production push: crop photos, rearranged navbars
Merge pull request #289 from Growstuff/dev

Production push: redesigned homepage, JSON API cleanup, RSS improvements, recent activity bugfix
Merge pull request #296 from Growstuff/dev

Production push: member bio, wrangler homepage, bugfixes
Merge pull request #299 from Growstuff/dev

Production push: newsletter signup and some backend stuff
Merge pull request #313 from Growstuff/dev

Production push: places
Merge pull request #315 from Skud/one-more-places-fix

(hotfix) Removed deploy script reminders, as no longer necessary
Merge pull request #317 from Skud/crop-hierarchy-caching

Hotfix: Added caching of full crop hierarchy
Merge pull request #321 from Growstuff/dev

Production push: order referral codes and some CSS fixes
Merge pull request #327 from Growstuff/dev

Production push: Harvests
Specify ruby version for heroku's benefit
Merge pull request #340 from Growstuff/dev

Production push: harvest improvements, more RSS, crop uploads, new garden fields
Merge pull request #353 from Growstuff/dev

Production push: crop search, backend upgrades, roots/tubers, map fixes
Merge pull request #357 from Growstuff/dev

Production push: improved navbar, fixed maps bug
added plantings, seeds, and harvests to the crops JSON
Add map, move info to sidebar
Tweak what's emitted as JSON

(let's just emit plantings for now, as that's all we're using)
Display crop plantings on a map
Reduced cluster radius for maps

on both crops and places pages

Did this because the clusters were annoyingly over-general, eg. showing
164 people in the eastern part of North America.  Cluster radius of 20px
is about the radius of the cluster icon itself.  Seems to work better
eg. for separating Melbourne from Sydney on the world map.
rearranged crop page headings and added tests
remove 1px wide black line on borders