Fixed podspec.
Travis entry for objective-c.
Build on Travis using the guide at http://9elements.com/io/index.php/continuous-integration-of-ios-projects-using-jenkins-cocoapods-and-kiwi/
Merge branch 'master' into use-travis

Conflicts:
	CreateSend.podspec
Use xctool.
It seems that `brew update` breaks the build on Travis.
Hmm, there's no formula for xctool on the build agent.
Run `xctool` using `sh` in test rake task to ensure build fails if any tests don't pass.
Clone xctool rather than brew installing on Travis.
CreateSend scheme is shared.
Kiwi needs to be set as a Target Dependency of CreateSendTests.
Include the git clone of xctool in the rake task until brew is working on Travis.
Added build status image to README.markdown.
Merge pull request #3 from campaignmonitor/use-travis

Build and test using Travis CI.