initial code for adding a "to" parameter to "run"
complete use of to parameter in stageRunner$run
complete initial "to" parameter tests, and add more thorough unit testing
update documentation
clean the code for this test up
fix compare_stage_keys and update unit tests
simplify compare_stage_keys
some initial tests for normalize_stage_keys
Merge pull request #1 from robertzk/run_to_parameter

Run to parameter