Add Vectorized Neural Net module

[Benardi]

Add Vectorized Neural Net module

Description

Add vectorized neural net module. Add tests for new module. Add documentation for new module. Organize new module and existing nn module into a single submodule.

Fixes #53

Type of change

Please mark options that are relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [x] Existing test environments via tox
• [x] Documentationo has been built and checked

Checklist:

• [x] I did follow the contribution guidelines
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[codecov[bot]]

Codecov Report

Merging #54 into master will increase coverage by 0.21%. The diff coverage is 100%.

@@           Coverage Diff            @@
##           master    #54      +/-   ##
========================================
+ Coverage   99.78%   100%   +0.21%     
========================================
  Files          12     10       -2     
  Lines         457    547      +90     
========================================
+ Hits          456    547      +91     
+ Misses          1      0       -1

Impacted Files	Coverage Δ
touvlo/nnet/sgl_parm.py	100% <ø> (ø)
touvlo/nnet/cmpt_grf.py	100% <100%> (ø)
touvlo/utils.py	100% <100%> (ø)	:arrow_up:
touvlo/lgx_rg/__init__.py
touvlo/rec_sys/__init__.py
touvlo/unsupv/__init__.py

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