Perform Travis CI build with latest release version of xctool
Execute `brew uninstall` before `brew install` to fix build errors on Travis
Add Support dependency to the ObjectMapping sub spec and migrate logging source files into Support subspec
Switch to rbenv from rvm.

* Remove ruby- prefix in .ruby-version
* Delete .ruby-gemset
Add Bundler config file and bin directory to .gitignore
DRY up version configuration in Podspec
Fix issues with request descriptor matching and add battery of explicit tests for descriptor precedence lookup. closes #1513
Fix RKResponseMapperOperation matchingResponseDescriptors to check for method match
Merge pull request #1517 from segiddins/bugfix/responsemapperoperation-matchingresponsedescriptor

Fix RKResponseMapperOperation matchingResponseDescriptors to check for method match
Remove explicit `bundle install` since Travis now prioritizes Bundler ahead of CocoaPods (see travis-ci/travis-ci#1276)
Enable support for mapping values in @metadata as relationships. fixes #1506
Merge branch 'masterDevelopment' into development
Add files to project and fix warning
Merge branch 'connectRelatedObjects' into development