added functions: sphere, peaks, venkat91, schwefel, ellipsoid, rastrigin
added functions: powers, ackley, michal, branins, easom, goldstein
added function documentation; function were instances now are instance.methods 
fosc3d moved to trott; changed default bounds for model plotter


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/mystic/mystic@751 968178ea-60bd-409e-af13-df8a517b6005
Merge branch 'master' of https://github.com/uqfoundation/mystic