Merge pull request #2 from kerryknight/develop

Develop
Merge branch 'master' into develop
Updated .gitignore to ignore pod installs for example and unit test projects
Updated querying methods to return RACTuples instead of NSDictionaries
Removed errors class

I no longer want to create a custom error if the a HealthKit data point returns nil. I want to keep HK's regular behavior and leave it to the user to check if there is a result or not.
Remove dlog stuff from test project's .pch
remove erroneous pod link into example app
bump podspec to 0.2.0
Merge branch 'develop'
Merge branch 'master' into develop
Updates for GitHub issues #3 and #4

Also, added -setNameWithFormat: to all methods for debugging with RAC_DEBUG_SIGNAL_NAMES