A search engine and ner demo using streamlit

[Leolty]

This PR fixes #45 and #46 .

Description of changes

This PR is just a demo for showing the following processeses:

1. build a pipeline to read, process and write mimic iii data
2. connect with Elasticsearch and store the data in it
3. visualize the results with streamlit

[codecov]

Codecov Report

Merging #51 (d88719f) into master (867b854) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #51   +/-   ##
=======================================
  Coverage   84.17%   84.17%           
=======================================
  Files           9        9           
  Lines         512      512           
=======================================
  Hits          431      431           
  Misses         81       81           

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