Merge pull request #29 from iea-annex60/issue2_functions

Merge Issue2 functions
Reformat documentation of Math.Examples #2

This commit corrects an error in the documentation of
Examples.SmoothExponential and reformats the documentation of several
examples to include a hyperlink to the function which the example tests.
Add unit tests for Math.Examples #2

This commit adds unit tests to the blocks InverseXRegularized,
PowerLinearized, QuadraticLinear, and SmoothExponential. With this commit,
all examples in Math run unit tests.
Merge remote-tracking branch 'upstream/master' into issue2_functions