tree 1fa7ba7909909a9f1d618175e5602706d210fd48
parent d432f78389e08baa5f2717f225097f38d611e082
author Sameer Agarwal <sameeragarwal@google.com> 1339449702 -0700
committer Sameer Agarwal <sameeragarwal@google.com> 1339478162 -0700

Dogleg strategy and timing cleanups.

1. A new dogleg trust region strategy.
2. Consistent naming of all variables taking and reporting
   time. Also all are doubles now.
3. Enum to stringification routines.
4. bundle_adjuster.cc accepts max solver time and trust_region_strategy.
5. Time accounting is pushed into solver_impl.cc and there is now
   postprocessing time accounted for explicitly.
6. IterationCallback now has cumulative time.
7. LoggingCallback logs per iteration and cumulative time.
8. TrustRegionStrategy now allows for Invalid steps to be indicated
   explicitly.
9. Trust region minimizer actually terminates on max_solver_time.

Change-Id: I7e3b82c8beebc17b6b355ea46ddd280754a2d8b2