- removed some TODOs from tests/parameters.test
- parameter dispositions:
We differentiate now between "initcmd" and "cmd": an "initcmd" is only
evaluated once, but one can provide configure values for this parameter
later. a "cmd" is executed on every evaluation, it is only possible
to pass cmds to it. The trailing argument of the configure parameters
(used e.g. for scripted object/class definitions) is now of type "cmd".
Implementation not yet complete (object cases are not correct).