Change pip package namespace to mlc

[rickstaa]

What do you think of changing the python package name to mlc instead of the written out machine_learning_control? This way the package namespaces are shorted. The only downside of doing this is that the abreviation might clash with already existing abreviations (see https://acronyms.thefreedictionary.com/MLC). The pypi package however is still available so we can still claim that (see https://pypi.org/search/?q=mlc&page=3). @panweihit Let me know what has your prefference.

[rickstaa]

@panweihit Closing this issue as the machine_learning_control namespace is more explicit and people can always do:

import machine_learning_control as mlc

Further, you mentioned that you had some changes in mind regarding the MLC framework being too broad. I, therefore, think this is not needed anymore.