Added inteface for linear systems
Added dense linear systems header files for CPP
Added dense linear systems
Working direct solve for dense linear systems
Working code for dense linear systems
Added algorithm options, input tests for dense linear systems
Working and tested code for dense-in-memory linear systems
Dense linear systems done
Added __init__.py for dense linear systems
Added install check for dense linear systems
Small changes to the error messages. Added a bit more I/O testing
Fxed a GBDB 4.2 issue
Added documentaiton for dense linear systems
A tiny bug fix
Fixed small bug
Small bug fix
changes after code review
Started work on sparse linear systems
Added interface for sparse linear systems.
Sparse linear systems untested code