Since Ceres is moving to using GitHub for issues, and the Google
Code URL in the current copyright header will soon become invalid,
update all the headers.
Change-Id: I1fce70375d1bcf098591f07b4d8f01a5c1e0789c
Program::SetParameterOffsetsAndIndex() was being called willy nilly.
Now the invariant is that any function that actually reorders the
program, updates the offsets and indices.
Also the logic around handling EIGEN_SPARSE has been simplified in
anticipation of the block AMD code that is forthcoming.
Last but not the least, num_eliminate_blocks, which is a rather
cryptic name to begin with has been replaced by the more meaningful
size_of_first_elimination_group.
Change-Id: I77e684f699a93b53e76aa406d64f40f8704df813
Move all the program reordering programs into their own file.
Also split the reordering routines for SPARSE_NORMAL_CHOLESKY
into individual library dependent routines.
Also get rid of RemovedFixedBlocksFromProgram.
Change-Id: Ie969f529e6d20dded9da021b9df1a040e08287c1
Keir Mierle