Add edit button to seeds index page

https://www.pivotaltracker.com/n/projects/646869/stories/53958137
Rearrange titles on RSS feeds

https://www.pivotaltracker.com/n/projects/646869/stories/50492161
Removed edit profile button from home page

Added yoongkang to the contributors list

Feature test for edit profile button on homepage
Merge branch 'dev' into editprofile

Conflicts:
	CONTRIBUTORS.md
Add test to new edit seed link
Changed staging environment hostname to staging.growstuff.org
Remove old capistrano stuff, as we don't use it anymore
Prevent the creation of a garden with a negative number for the area.  If entered, the area must be greater than or equal to zero.
Added a test for the validator to show it doesn't accept negative numbers for garden area.
Merge pull request #441 from yoongkang/editprofile

Removed "Edit Profile" button from home page
Merge pull request #447 from krio/add-edit-button-seeds-index

Add edit button to seeds index page
Merge pull request #450 from Skud/login_timeout

Login timeout
Merge pull request #452 from wsmoak/negative-area

Prevent the creation of a garden with a negative number for the area.
Comments RSS tests
RSS feed tests
Merge branch 'dev' of https://github.com/Growstuff/growstuff into rails4-upgrade
Merge pull request #454 from krio/rearrange-rss-titles

Rearrange titles on RSS feeds
Fixed a bug which only occurs in the few months before February

This is the fundamental problem:

    2.1.2 :005 > Time.zone.now + 3.months
    => Sat, 28 Feb 2015 03:17:24 UTC +00:00
    2.1.2 :006 > Time.zone.now + 3.months + 3.months
    => Thu, 28 May 2015 03:17:32 UTC +00:00
    2.1.2 :007 > Time.zone.now + 6.months
    => Sat, 30 May 2015 03:17:37 UTC +00:00

I changed the test to use the "3.months + 3.months" formulation and it
now passes.
Merge pull request #456 from Skud/paidaccountbug

Fixed a bug which only occurs in the few months before February
Merge branch 'dev' of https://github.com/Growstuff/growstuff into rails4-upgrade