Renamed componenets
Renamed components
Revert "Renamed components"

This reverts commit cc955cfd4c45edd8bd183d8c6f2db6616b5d234d.
Added GetIssuesCommand to command. Refactored IssueManager
Added GetLabelsCommand to command. Refactored LabelManager in model
Added GetMilestonesCommand and GetCollaboratorsCommand
Refactored CollaboratorManager
Removed setRepository() from ModelFacade
Merge remote-tracking branch 'origin/command'