Tweak README a bit (#38)

[Kirill888]

• add links to documentation and sample notebooks
• remove crs/resolution parameters from sample
• Update sample notebook for planetary computer, removed no longer needed installation instructions

Closes #38

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Codecov Report

Merging #39 (7c0d984) into develop (e6131c2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop      #39   +/-   ##
========================================
  Coverage    93.98%   93.98%           
========================================
  Files           10       10           
  Lines          765      765           
========================================
  Hits           719      719           
  Misses          46       46           

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