Add IBM Watson integration to bot flow

[alexandrebarbaruiva]

PR Description

Add IBM Watson integration to analyze user's sentiment

Fixes: #53 Fixes: #67

New Feature Submissions

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• [X] Does your submission pass all the tests?
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• [X] Have you written proper tests to your added code?

[codecov[bot]]

Codecov Report

Merging #68 into master will decrease coverage by 8.34%. The diff coverage is 64.15%.

@@            Coverage Diff             @@
##           master      #68      +/-   ##
==========================================
- Coverage   92.41%   84.06%   -8.35%     
==========================================
  Files           3        5       +2     
  Lines         145      182      +37     
  Branches       12       15       +3     
==========================================
+ Hits          134      153      +19     
- Misses         10       25      +15     
- Partials        1        4       +3

Impacted Files	Coverage Δ
bot/config_reader.py	100% <100%> (ø)
bot/communication.py	76.92% <44.44%> (-23.08%)	:arrow_down:
bot/watson.py	66.66% <66.66%> (ø)
bot/application.py	84.72% <66.66%> (-1.7%)	:arrow_down:

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