NJ tree tool

[dfornika]

Addresses #66 for MentaLiST-0.1

[codecov-io]

Codecov Report

Merging #67 into mentalist_v0.1 will not change coverage.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           mentalist_v0.1      #67   +/-   ##
===============================================
  Coverage           38.26%   38.26%           
===============================================
  Files                   4        4           
  Lines                 575      575           
===============================================
  Hits                  220      220           
  Misses                355      355

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[coveralls]

Pull Request Test Coverage Report for Build 207

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 38.261%

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Totals
Change from base Build 188:	0.0%
Covered Lines:	220
Relevant Lines:	575

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💛 - Coveralls