PopED version 0.3.0

• Added new optimization methods and tools, see ?poped_optim(). This function incorporates the new optimization routines optim_ARS() and optim_LS which are optimized versions of previous optimization algorithms used in PopED. Both can be run with parallelization. poped_optim() also incorporates the genetic algorithm from GA::ga(), which can also be run with parallelization, and the "L-BFGS-B" method from stats::optim(). poped_optim() should be more efficient and faster than poped_optimize().
• Changed the default objective function to be the log of the determinant of the FIM. create.poped.database(ofv_calc_type=4)
• Various small changes and bug fixes.