DOC: Fix formatting.
DOC: Fix broken links.
DOC: Make sure release placeholders is short version
DOC: Remove redundant and outdated information.
DOC: Add FAQ page
Merge pull request #1527 from jseabold/update-docs

DOCS: Update docs add FAQ page
DOC: Fix link
Merge pull request #1530 from jseabold/fix-link

DOC: Fix link
DOC: Fix link.
DOC: Ran linkcheck. Fixed links.
Merge pull request #1531 from jseabold/fix-links

DOC: Fix stale links with linkcheck
DOC: Fix link to code on github
Merge pull request #1533 from jseabold/fix-gh-links

DOC: Fix link to code on github
ENH: Medcouple for robust skewness estimation
ENH: Function allowing other functions to be applied using only 1d
    at a time
ENH: Robust Skewness from Kim and White
ENH: Robust Kurtosis from Kim and White
ENH: Helper functions for quantile.  Different from numpy.
ENH: Tests for medcouple
BUG: Made use of np.apply_along_axis and replaced custom version
General improvements to robust skewness and kurtosis
ENH: Generalized other texts to work along axis for standards
Simplified code to remove new weighted quantile function, instead
    use np.percentile
Removed incorrect test file in tools/tests/test_statstools.py
Added tests for multi-axis functions in stattools
Clean-up and documentation for robust skewness and kurtosis measures
Cleaned-up stattools
Added docstring for those missing
Added test for robust kurtosis
Fixed defect where ties were not handled correctly by medcouple
Reverted space additions around ** operator
Removed unnecessary float powers