Added unified parsing

[nspielbau]

See #51

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 22 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (4a12eec) to head (50340c1).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
catmux/window.py	0.00%	12 Missing ⚠️
catmux/split.py	0.00%	6 Missing ⚠️
catmux/session.py	0.00%	2 Missing ⚠️
catmux/utils.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #53       +/-   ##
==========================================
- Coverage   89.24%   0.00%   -89.25%     
==========================================
  Files           6       7        +1     
  Lines         251     255        +4     
==========================================
- Hits          224       0      -224     
- Misses         27     255      +228     

Flag	Coverage Δ
unittests	0.00% <0.00%> (-89.25%)	⬇️

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[fmauch]

This seems fair. @nspielbau would you mind having a look at my small comments?

[nspielbau]

I also added a check to skip over empty splits, as the session creation failed otherwise. We can drop that if we don't want that

[nspielbau]

During testing, I realized that the 'tiled' window of the example session was not initialized correctly with this command parsing. I will take a look at that