minor error corrects and enhancements w.r.t. the implemented dfo algorithms
errors: wrong name G_opt for gradient in performOptimization with RCS,
in getMultiStarts gradient_opt not set in error catch
enhancements: rename optimizers and files to have just one name in use: dhc, rcs.
improve catching erroneous user input for rcs,dhc options
have just 1 list of all accepted optimizers in PestoOptions, use that for output (will be easier to avoid errors in the future this way...)
minor error corrects and enhancements w.r.t. the implemented dfo algorithms
errors: wrong name G_opt for gradient in performOptimization with RCS, in getMultiStarts gradient_opt not set in error catch
enhancements: rename optimizers and files to have just one name in use: dhc, rcs. improve catching erroneous user input for rcs,dhc options have just 1 list of all accepted optimizers in PestoOptions, use that for output (will be easier to avoid errors in the future this way...)