Merge branch 'release/v0.20.0-rc1'
Merge branch 'release/0.20.0'
Drop pre from README.md install instructions
Merge branch 'release/0.20.1'
Adjust version and tag in Podspec for release
Merge branch 'release/0.20.2'
Docs: RestKit does not seem to ship with Appledoc binaries
Rakefile: Remove template path from appledoc invocation

With the template path included, docs refuse to build. By creating an empty folder, docs start to build but then fail with "Object template file 'object-template.html' is missing" error.
Fix incorrect usage of a couple of classes
Fix issue with incorrect property declaration in `RKHuman` test model interface
Merge pull request #1445 from paulmelnikow/building_docs

Fix 'rake docs' and related documentation
Conditionalize test so that it passes under iOS 7/10.9
Add support for registering custom `RKMappingOperationDataSource` implementations with `RKResponseMapperOperation`. closes #1442, #1447
Polish modification detection API's and add support for skipping property mapping based on date/numeric ascension comparison. closes #1391
Fix Xcode 5 -Wdocumentation warnings from mismatched parameter names/returns
Merge pull request #1453 from erikcharlebois/development

Fix Xcode 5 -Wdocumentation warnings from mismatched parameter names/ret...
Fix retain cycle (issue 1404)
Merge pull request #1458 from mirego/fix-issue-1404

Fix retain cycle (issue #1404)
Fix memory leak in iOS 5 and 6 when calling "- [NSCachedURLResponse data]"
Merge pull request #1459 from mirego/fix-memory-leak-ios

Fix memory leak in iOS 5 and 6