REL-2.5.0rc1

• Several independent workpackages within a step can be executed by multiple processes in parallel by stating procs=#number_of_parallel_processes# within the step tag. An example and a documentation entry was added.
• A result database can be produced by use of the database tag. An example and a documentation entry was added.
• python2-support was removed.
• A couple of unittests were added which now include the testing of most of the examples.
• Sample run.log of most examples were added to tests/examples_output.
• Some yaml example scripts were corrected.
• The MANIFEST file was removed.
• A typo in the error message was fixed.
• Fix result command documentation.
• A wrong result entry in the glossary was fixed.
• A bug for the usage of a newline separator within yaml scripts is resolved.
• A feature to create a do_log file for every workpackage of a step is integrated. The do_log file contains the whole environment while execution, the execution shell, the change of current work directories, comments if a directive was executed in a shared fashion and the do directives of the steps.
• The execution cancels now, when a parameter is of type int or float and the parameter value has not the form of a int or float correspondingly.
• The FAQ documentation was extended with yaml examples.