Renamed Class to better reflect it's content
Update references to the previus rename
Refactor: Move FollowModes enum to a more logical class
Refactor: Rename Follow Heading algorithm to Lead
Fixing references affected by last rename
Changed Lead to make the copter position itself in front of the user
Rework the contruct structure of the follow algorithms
Merge pull request #882 from arthurbenemann/followRefactor

Follow refactor