JDWarner/scikit-fuzzy: Scikit-Fuzzy 0.3.1

This minor point release brings a significant new feature and minor fixes/compatibility enhancements:

Major feature:

• Arrays are now accepted as system inputs; all inputs must have the same shape. The output matches this shape. This is dramatically more computationally efficient for repeated runs on existing data - within the limits of your system memory. (see #141)

Major fix

• Fixed the mathematical definition of skfuzzy.gaussmf; this is a potentially breaking change but the results are now correct (see #147).

Minor fixes

• NetworkX 2.0 forward compatibility (see #149 and #150)
• Improve and harmonize the .view() methods in skfuzzy.control (see #142 and #148)
• Update examples to use the above