sPuReMD: remove force tabulation for charge matrices. Revise list references to mirror MPI code. Revert GMRES iteration counter.

sPuReMD: fix GMRES bug introduced from previous refactoring. Explicitly link OpenMP for library. Refactoring to remove global variables. Remove unnecessary OpenMP barriers after single regions.

sPuReMD: fixes to remove compilatoin warnings. Replace standard library functions with safer versions to avoid buffer overruns. Safer use of placeholders in format strings for printing.

sPuReMD: split into library and driver for, e.g., optimization integration. Fix bug with interaction lists being allocated for hydrogen bonds when no hydorgen atoms present. Fix minimum allocation size of 3-body lists (uncovered with small lithium geometries). Refactor naming of conflicting data structures. Update .gitignore.

sPuReMD: add safe memory allocation functions. Fix issue with certain parameters for shielded van der Waals interactions not being correctly initialized. Other general refactoring.

sPuReMD: further OpenMP work on force computations and interaction lists. Minor data structure scope changes. Fix numereous non-critical memory leaks. Add tear-down code. Other general refactoring.

sPuReMD: begin merging code from LAMMPS USER-REAXC-OMP/USER-OMP. Fix ACKS2 charge matrix coefficients.

sPuReMD: refactor tri solve level sched memory management. Change OpenMP thread scheduling policy to static. Modify logging output format.

sPuReMD: fix diagonal preconditioner computation and level scheduling application. Modify preconditioner logic to compute and cache sparsity-based info. Update run script.

Add minor checks to PG-PuReMD and PuReMD. Major refactoring of sPuReMD: backport much of PuReMD code and add CUSTOM geo format.

sPuReMD: fix SuperLU build and code. Fix ILU_PAR (compute factors separately). Move diagonal preconditioner computation. Refactor precondition computations. General code clean-up.