Extends HEAppE operators
Whats done:
- dynamic composing of paths to stderr, stdout, stdlog, stdprog files for all Tasks of HEAppE job
- all possible (working) job parameters are now available through operator HEAppEPrepareJobOperatorFullContext
- implements #8
- datatypes for #8 which is relevant to #7
- pulling logs of tasks is limited by bug in HEAppE #21