working on parameter input
working on version with parameters_use table but without old tables
added doc/substances.add.dia from db-rework-branch
corrected some names
renamed add.ctp to derive.ctp
working on implementation of inheritance
added example sql tables
Merge branch 'doc' into devel-without-old
added inherit.ctp
implemented parameter creation on parameter_use_definition on
substance_creation
adding parameter definitions now working
added redirect after parameter_use definition end
backstep from parameter_use/define to substance/add working
corrected problem in formula model
added userid, data and parameter_pid to parameters_use.

unfortunateley, the designer did not see, that for storing a
parameter_user, we also need an sid
patched code: defined parameters stored after substance storage