changed titles
Merge pull request #992 from teamleada/Brian_New_MH

changed titles
Create project sets
Add project set seed file
Annotate project sets and evaluation contents
Add project set id to projects
Add project_set relationship to projects
Add methods to check if a project belongs to a set or not
Add 'displayable' method
Associate mighty hive parts with the project set
Display buttons to access each of the projects