Merge pull request #20 from MarcCote/refactor

Remove upper case in library name and script's name

http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap12.html
Merge pull request #21 from MarcCote/pool_of_workers

Pool of workers
WIP support range, linspace, logspace, uniform, normal, choice, list expandable parameters