Gittrac #4550:  First phase of taking out Stork-related code.
Gittrac #4550:  More Stork-related code removed.
Gittrac #4550:  Removed logsource, got rid of job type-related ifs
in Dag and Job classes, etc.
Gittrac #4550:  Pretty much finished removing Stork-related code;
no documentation yet, though.
Gittrac #4528:  First phase of this (includes merge of what I've
done so far for #4550).