Parallel-manager

**Full Changelog**: https://github.com/William-An/parallel-manager/compare/v0.0.2...v0.1.0

* Add request packet serialization and deserialization methods
* Add support to save pending tasks in queue and in workers
* Add support to load tasks from a saved file

**Full Changelog**: https://github.com/William-An/parallel-manager/commits/v0.0.2

* Add support for create log file if it does not exist
* Create test for shell manager on simple workload