Refactor diagnostic helpers to take SourceLocations
Rename {parse,check}OrdinalIdentifier
Move ordinal identifier parsing into helper method
Properly parse the Stir method step
Add test for the Stir method step
Properly parse the Mix method step
Add test for the Mix mixing step
Properly clean the Clean method step
Add test for the Clean method step
Properly parse the Pour method step
Add test for the Pour method step
Properly parse the Refrigerate method step
Add test for the Refrigerate method step
Properly parse the Set Aside method step
Add test for the Set Aside method step
Improve dumping of identifier tokens
Properly parse the Serve method step
Add test for the Serve method step
Add test for the Verb method step
Add test for the Until Verbed method step