AGTGreg/runium

Features
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* **Concurrency**: Run a task once or many times in its own Thread or Process.
* **Repetition**: Run tasks periodically on even time intervals. Optionally for a certain amount of times.
* **Scheduling**: Run tasks at a certain date and time.
* **Callbacks**: Runium tasks can accept callback functions which are executed when the task is finished running.
* **Simplicity and Readability**: Do all the above in a single line of code that is easy to read.