Make a new mathematical programming solver available to sybil via the
SYBIL_SETTINGS command.
addSolver(solver, method, probType)A single character string giving the name of the desiered solver.
A character vector of algorithms supported by the solver given in
solver.
A list of hte same length as method containing a vector of character
strings for each method which types of problems can be solved with that
method: method[i] of solver can solve problems of type
probType[[i]]. Problem types could be "lp": linear
programming, "mip": mixed integer programming or "qp":
quadratic programming.
The function returns NULL invisibly.
The parameters to the algorithms given in method are set to NA,
which means, the default parameters of the solver software will be used. If a
solver already exists, an error message will be given.