update readme and license

[houpc]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 95.08197% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.28%. Comparing base (ef95625) to head (3c84972).
⚠️ Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
MCintegration/base.py	50.00%	2 Missing ⚠️
MCintegration/maps.py	88.23%	2 Missing ⚠️
MCintegration/maps_test.py	98.24%	1 Missing ⚠️
MCintegration/utils_test.py	97.36%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #39      +/-   ##
==========================================
- Coverage   95.46%   95.28%   -0.19%     
==========================================
  Files          10       10              
  Lines        1366     1441      +75     
==========================================
+ Hits         1304     1373      +69     
- Misses         62       68       +6     

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