Split config files into seperate responsibilities

[JakobGM]

• astrality.yml has now been split into three separate files: astrality.yml for global configuration options, modules.yml for global modules, and context.yml for global context.
• Directory module config file config.yml has been renamed and split into modules.yml and context.yml. See point above.

I have also removed the prefixes config/, module/, and context/, as these are now uneccessary, as the filename determines the type.

All internals represent the configs the same way still, a single dictionary with prefixes. I will probably change this at some point, to clean the code base up a bit. But it will require changing a lot of tests, so I will procrastinate a bit on this issue.

[coveralls]

Pull Request Test Coverage Report for Build 370

• 106 of 110 (96.36%) changed or added relevant lines in 8 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 97.568%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
astrality/config.py	74	78	94.87%
<!--	Total:	106	110	96.36%	-->

Files with Coverage Reduction	New Missed Lines	%
astrality/config.py	3	95.95%
<!--	Total:	3		-->

Totals
Change from base Build 366:	-0.1%
Covered Lines:	3611
Relevant Lines:	3701

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💛 - Coveralls