v0.3.0

This release adds raw git repositories as a source for running or importing scripts. See the updated README for details on how to use this feature. Additionally, the following changes have been made:

• Add --fresh flag to force non-cached scripts
• Switch to async_process instead of using sync methods
• Propagate the exit code of the executed script from rem run
• Switch to regex parsing for repo and script strings
• Improve logging and error formatting