Updated field class to use doubleborder mixin
fixed undefined offset #2276
Minor bug fix to show link description field 

When adding a link, the description field was present, but hidden. Adjusted javascript to show the description field
Changelog note on form method limitations

See 14c59be85e9ec53cb2f0b3e9d0d8ce7569d913c6.
Raised by Fara Rustein of Deloitte Argentina (CVE-2013-2653).
Merge pull request #2284 from wilr/closure_this_reference_fix

FIX: pass controller as reference inside closure.
Merge pull request #2278 from jonshutt/patch-1

Minor bug fix to show link description field
Merge pull request #2277 from joernroeder/3.1

fixed undefined offset #2276
Docs: Consistent arg quoting in <% require %> (#1614)
Merge pull request #2271 from ARNHOE/3.1-twotoneborders

Updated field class to use doubleborder mixin
FIX: Remove limit on GridField export

Allow DataList::limit() to take a null value to remove the limit.

Added tests for limit(). Note the one failure, currently the ORM doesn't support unlimited values with an offset.