Feat/batch

[AleksMat]

Implements a Python interface for Sentinel Hub Batch Processing API. It also adds tests and a tutorial notebook.

Closes #136

Note: this PR also contains changes from PR #138, which should be merged first.

[batic]

First part of review process - going through files on GitHub.

[batic]

Generally I'm ok with SHB, but I'd also like to see methods reordered groups of similar functionality methods (e.g. all properties together, all static methods together, everything dealing with creation of urls together etc.)

[codecov-io]

Codecov Report

Merging #141 into develop will decrease coverage by 0.83%.
The diff coverage is 80.48%.

@@             Coverage Diff             @@
##           develop     #141      +/-   ##
===========================================
- Coverage    90.88%   90.05%   -0.84%     
===========================================
  Files           30       31       +1     
  Lines         3061     3257     +196     
===========================================
+ Hits          2782     2933     +151     
- Misses         279      324      +45     

Impacted Files	Coverage Δ
sentinelhub/areas.py	89.62% <26.66%> (-3.71%)	⬇️
sentinelhub/geopedia.py	90.69% <71.42%> (-0.43%)	⬇️
sentinelhub/decoding.py	84.61% <75.00%> (-0.72%)	⬇️
sentinelhub/download/client.py	95.18% <76.47%> (-4.82%)	⬇️
sentinelhub/sentinelhub_batch.py	80.68% <80.68%> (ø)
sentinelhub/sentinelhub_request.py	86.15% <93.33%> (+2.96%)	⬆️
sentinelhub/aws.py	91.66% <100.00%> (+0.05%)	⬆️
sentinelhub/aws_safe.py	98.44% <100.00%> (+0.01%)	⬆️
sentinelhub/constants.py	96.92% <100.00%> (+0.06%)	⬆️
sentinelhub/download/aws_client.py	76.74% <100.00%> (-1.98%)	⬇️
... and 5 more

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[batic]

Few more notes on the notebook with the example:

a) descartes package is mentioned to be used, but is not
b) in the "Set up an S3 bucket", I'd also use "warning div" approach (similar as for defining time_interval above), but I leave it up to you to decide.
c) it would be quite useful to put the plot_batch_splitter(splitter) method into BBoxSplitter class and make it a class method. The particular subclass BatchSplitter can then implement it's own plotting (to support tile info). If you agree, please make an issue.

With this, I conclude my long going review (really sorry about that).

[AleksMat]

a) descartes package is mentioned to be used, but is not

descartes is actually an extra geopandas dependency that is required for making those plots.

b) in the "Set up an S3 bucket", I'd also use "warning div" approach (similar as for defining time_interval above), but I leave it up to you to decide.

For now, I think it is ok to leave this as it is.

c) it would be quite useful to put the plot_batch_splitter(splitter) method into BBoxSplitter class and make it a class method. The particular subclass BatchSplitter can then implement it's own plotting (to support tile info). If you agree, please make an issue.

The problem here is only that I wouldn't want that matplotlib, geopandas, and descartes become sentinelhub-py dependencies. But if we implement this in a way that those are only extra dependecies and one can install the package without them then I agree with this. I'll open a new internal issue about this.