Changed setCentroid to setCenter
Revert "Updated erase() method for Circle class"

This reverts commit 4a78ef199e34a2e6176a44700467bc9ae17abfbd.
Revert "Revert "Updated erase() method for Circle class""

This reverts commit 72d16b042a55bd8da0757953a20a317820795629.
Changed centroid to center
Updated examples with new method name
Updated documentation

Deleted Latex files.
Fixed bug

Circle was not properly setting radius.
Updated examples
Updated documentation