Adding two more converted/updated .md use cases.
Adding Scenarios folder for team scenarios.  README.md is a placeholder
only for new folder.
Adding two additional amended use cases for Context and role
functionality in .md format.
Merge pull request #22 from ahajirnis/CLUBUML_62

Clubuml 62 - Pull request to add updated use cases to Documents and add Scenarios folder for team members to upload their scenarios.