Add modules in __init__

[ninamiolane]

No description provided.

[codecov]

Codecov Report

Merging #43 (1c5e670) into master (74e13fe) will decrease coverage by 0.20%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #43      +/-   ##
==========================================
- Coverage   95.32%   95.13%   -0.19%     
==========================================
  Files           7        7              
  Lines         363      369       +6     
==========================================
+ Hits          346      351       +5     
- Misses         17       18       +1     

Impacted Files	Coverage Δ
ioSPI/__init__.py	100.00% <100.00%> (ø)
ioSPI/fourier.py	98.51% <0.00%> (-1.49%)	⬇️

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