1. Document the use of dogleg and a general discussion of
trust region methods.
2. Added a TBD section on compiler/linker flags.
3. Summary::FullReport now prints out sparse_linear_algebra_library
and trust_region_strategy_type.
Change-Id: I01f680070d510715900f345364855689005d54bb
1. Split into two parts - Tutorial & Reference.
2. Reference is split into Modeling and Solving.
3. Build instructions now mention CXSparse.
Change-Id: Id67fa1134f3fc2b2cea9ccf2f32d5b16d435ba6e