Scale transform

[jankrepl]

Closes #51

Also related #48

[codecov]

Codecov Report

Merging #53 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #53   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines         1611      1646   +35     
=========================================
+ Hits          1611      1646   +35     

Impacted Files	Coverage Δ
deepdow/data/__init__.py	100.00% <100.00%> (ø)
deepdow/data/augment.py	100.00% <100.00%> (ø)

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