updating dependencies
Merge pull request #41 from nwest/dependency-updates

Updating Dependencies
Bumping version to 0.3.1

Updating gemspec
[Issue #42] Preventing exceptions caused by messaging nil in build command
[Issue #43] Allow uploading of just .dSYM for HockeyApp distribution
[Issue #20] Loading TestFlight and HockeyApp credentials from environment (or .env file) unless otherwise specified
Removing documentation for unimplemented [output] arg in build command
Bumping version to 0.4.0
Fix README HockeyApp instructions to indicate correct ENV variable.
Fix Readme for ftp distribution
Merge pull request #47 from gregplumbly/master

Fix Readme for ftp distribution
Merge pull request #46 from mtitolo/patch-1

Fix README HockeyApp instructions to indicate correct ENV variable.