Added another constructor and supporting logic.
Removed unnecessary #includes
Added copyright notice
Although my compiler isn't complaining when I remove the cmath and algorithm #includes, I am suspicious...added them back
Changed constructor, spinner can now automatically centre itself on its parent widget and modality can be set by the user
Updated copyright notice
Cosmetic refactoring.
Renamed members and changed member grouping
Updated license file
Updating README in progress
Updating README in progress
Updated README
Gave member variables and mutators more meaningful names
More meaningful name refactoring
Renamed speed member and changed type
Replaced C-style casts
Changed opacity type to eliminate unnecessary casts
Changed trail type to eliminate unnecessary casts
Updated README
Forgot to add explicit keyword back when I removed the second constructor