Universal Framework Script

It'd be nice to have a script that generates a universal framework for EarlGrey. Then when EarlGrey is used in CI, the dependency doesn't have to be recompiled.

- https://github.com/AudioKit/AudioKit/blob/master/Frameworks/build_frameworks.sh
- https://github.com/KeepSafe/ObjectiveRocks/blob/frameworks/build_universal_framework.sh
- http://devcenter.bitrise.io/docs/should-i-commit-my-dependencies-into-my-repository

Start by comparing the linked AudioKit and ObjectiveRocks framework-building scripts and checking how EarlGrey is built for CI. The work is done when EarlGrey has a script that generates a universal framework suitable for CI use so the dependency does not need recompilation.

Written by the indexing model from the issue text.