Add Kaufman Adaptive Moving Average

[jhmenke]

The indicator was tested against the reference investopedia article. It has more settings than other indicators, so the name could be parsed into five parts now.

close_10_kama_2_30

has three settings:

• 10 is the number of periods for the Efficiency Ratio (ER).
• 2 is the number of periods for the fastest EMA constant.
• 30 is the number of periods for the slowest EMA constant.

To make sure regular indicators are parsed as usual, only those within the tuple MULTI_SPLIT_INDICATORS will be parsed into five parts.

[jhmenke]

It seems that the only issue is missing flake8 formatting. Sorry i don't have that installed.

[jealous]

Thanks for the PR.
The change Looks fine to me. Could you please address following flake8 error so that we could pass the build and merge it?

stockstats.py:928:80: E501 line too long (123 > 79 characters)
stockstats.py:943:80: E501 line too long (84 > 79 characters)
stockstats.py:946:45: E225 missing whitespace around operator
stockstats.py:946:46: E202 whitespace before ')'
stockstats.py:947:80: E501 line too long (120 > 79 characters)
stockstats.py:951:80: E501 line too long (133 > 79 characters)
stockstats.py:966:80: E501 line too long (86 > 79 characters)
stockstats.py:1089:80: E501 line too long (80 > 79 characters)
test.py:568:80: E501 line too long (101 > 79 characters)
test.py:569:80: E501 line too long (101 > 79 characters)
test.py:570:80: E501 line too long (99 > 79 characters)

[codecov-commenter]

Codecov Report

Merging #86 (c2c4ee4) into master (e6123f6) will increase coverage by 0.26%.
The diff coverage is 98.03%.

@@            Coverage Diff             @@
##           master      #86      +/-   ##
==========================================
+ Coverage   95.12%   95.39%   +0.26%     
==========================================
  Files           3        3              
  Lines        1087     1129      +42     
==========================================
+ Hits         1034     1077      +43     
+ Misses         53       52       -1     

Impacted Files	Coverage Δ
stockstats.py	96.55% <97.22%> (+0.33%)	⬆️
test.py	100.00% <100.00%> (ø)

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[jhmenke]

We should be good now. It is unclear to me why the Python 2.7 test fails. I specifically tested it with a new 2.7 environment on my machine and the test passed without issue.

[jealous]

It' OK. Let me deal with it when I have time. I will merge this PR when I have the solution.
Thanks for the contribution.