Fix for MSVC. unordered_map is now part of the standard.
Fixed include error in ldl_driver.cpp
Merge pull request #4 from PetterS/msvc

Fix for MSVC. unordered_map is now part of the standard.
Changing the DEBUG macro to SYM_ILDL_DEBUG. Library now compiles in Visual Studio 2013.
Removing namespace 'tr1.' Can now compile with gcc 4.8.1.
Merge pull request #5 from PetterS/msvc_fix

Changing the DEBUG macro to SYM_ILDL_DEBUG.
Merge branch 'master' of https://github.com/inutard/matrix-factor
Bug in choosing equilibration procedures fixed.