Add function to convert size from bytes to a more readable format

[lguerard]

Fixes #95

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 25%. Comparing base (1a0f954) to head (2f7d719).
⚠️ Report is 12 commits behind head on devel.

Files with missing lines	Patch %	Lines
src/imcflibs/imagej/misc.py	88%	1 Missing ⚠️

Additional details and impacted files

@@         Coverage Diff          @@
##           devel   #101   +/-   ##
====================================
  Coverage     25%    25%           
====================================
  Files         25     25           
  Lines       1766   1776   +10     
====================================
+ Hits         435    441    +6     
- Misses      1331   1335    +4     

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[ehrenfeu]

The function name convert_bytes isn't really telling what it's actually doing, it only reveals the bytes are converted to something unknown.

Please rename it to human_bytes or similar.

[ehrenfeu]

Removed it from the current milestone as this is probably not blocking other code - feel free to re-add if you need it already now.

[ehrenfeu]

#126

[ehrenfeu]

I rebased this PR onto current devel in order to reduce the complexity of merging it (misc.py had many other changes already in devel, resulting in a lot of potential conflicts).

🚨 @lguerard please make sure to git pull delete your local branch and create a new one from the PR before continuing your work on this!! 🚨

Let me know if you need help with this!