Filters out requirements in other sessions
Fixes bug with filtering out too many reqs
Requirement selection now filters out requirements that are in play.
If current session is open, ended, or closed the requirement selection
panel does not remove the associated requirements. William Jones, Andrew
Leonard.
Now checks and informs user if requirements get automatically removed when a session is modified becuase the requirement has already been estimated.
Lost Requirements Popup buttons work correctly. William Jones, Andrew
Leonard.
Planning poker notifiys a user attempting to save or start a game of any
requirments that have been removed from the session.
Now when a session has all of it's requirements filtered out due to conflicts, save and start buttons are greyed out. Authors: Will Jones, Andrew Leonard. Assist from Jon Dorich.
Unbreaks create session by initializing a hashset.
Resolve rebase error
Merge pull request #237 from TheTeam8s/feature-limitReqs-rebase

Feature limit reqs rebase. See issue #249