Clean up gitignore
Fix bundler version
Setup rspec
Implement first version of env
Specify overshadowing behaviour
Capture messages during execution
Add a doc block
Pass arguments to block
Track captured and free messages
Locals should not shadow scope methods
Ignore build artifacts
Update rake
Ignore bundle config
Split up locals and ivars
Replace the scope writer with attr_writer
Fix doc and spec strings
Add docs for env variables
Allow passing in settings through the constructor
It should return the block's return value
Only track uncaptured messages