217 add functionality to send callback messages

[okolo]

Progress reporter API was added

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (f8ce41a) 57.18% compared to head (a13948d) 57.70%.

Files	Patch %	Lines
oda_api/api.py	85.71%	4 Missing ⚠️
tests/test_progress_report.py	90.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #225      +/-   ##
==========================================
+ Coverage   57.18%   57.70%   +0.51%     
==========================================
  Files          22       23       +1     
  Lines        4723     4781      +58     
==========================================
+ Hits         2701     2759      +58     
  Misses       2022     2022              

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[burnout87]

Is it also possible to add a test?

[burnout87]

Should an instance of the ProgressReporter be a member of any DispatcherAPI object?

I think it would be more clean and transparent

[volodymyrss]

Please add docs too, @okolo . See where they appear for this PR .

[volodymyrss]

Should an instance of the ProgressReporter be a member of any DispatcherAPI object?

I think it would be more clean and transparent

Because it's a different way to access dispatcher, it may be a separate class.