Updated the TestFlight plugin to load API and Team tokens from a list of token pairs which are configured globally.
Providing a small amount of backwards compatibility by allowing existing configurations to load their API and Team tokens. Those tokens will be lost the next time the configuration is saved though.
To help users when builds fail, the plugin now provides an error message when the tokenPairName does not provide a TokenPair. It used to just end up throwing a NullPointerException.
Merge pull request #21 from dlvenable/global-tokens

Added support for system API/Team tokens