corrected compiler flags to enable ARC build for OS X lib
Merge pull request #323 from mralexgray/arc-local

corrected compiler flags to enable ARC build for OS X lib
Fix warnings in the tests
Fix warnings in the main target
Report failures for tested nil subjects properly
Merge 'master' into current branch
Merge pull request #330 from allending/arc-conversion

Correct OS X compiler flags
Podspec wasn't picking up Classes folder correctly, add myself as author
Fix some warnings instead of suppressing them
Merge pull request #326 from luisobo/fix-warnings

Fix or silent warnings.
Merge pull request #331 from allending/fix-podspec

Podspec wasn't picking up Classes folder correctly, add myself as author
Merge pull request #333 from allending/fix-warnings

Fix some warnings instead of suppressing them
Use method declaration instead of property
Merge pull request #329 from allending/fix-nil-matcher

Report failures for tested nil subjects properly
Adjust formatting to match.
Add class name to failure message in equality checks

Added to descriptino of KWEqualMatcher as well, for consistency.

Fixes #348
2.2.1 release
Silence deprecation warning for /usr/bin/atos.

`callSiteWithAddress` uses the `atos` command line tool
tool, which outputs the following to stderr when run on OS X 10.9
(13A569) & XCode 5 GM:

```
--
Warning: /usr/bin/atos is moving and will be removed from a future OS X release.
It is now available in the Xcode developer tools to be invoked via: `xcrun atos`
To silence this warning, pass the '-d' command-line flag to this tool.
--
```

This commit silences the warnings.
Remove failing brew command from travis.yml.
Don't use libunwind on ARM.