Also update copyright year. Change-Id: I8508d4fd4564c646ec2281a1b3b2c36136b54b46
In the process also move some documentation from the file header to just above the class declaration. This change is in response to https://github.com/ceres-solver/ceres-solver/issues/233 Change-Id: I08cff1a94c57b67dd2bd8be4dba8c3fce46b68ab