Revert whitespace changes from previous commit

The previous commit included several whitespace changes and unnecessary
linebreaks. These are reverted with this commit.
Add new blocks for existing functions

Some functions did not have corresponding blocks. This commit adds 8 of
such blocks to the package.
Add new functions for existing blocks #2

3 blocks did not have corresponding functions. This commit adds the
functions for these blocks. There are no functions for the blocks Max and
Min as these use a standard function from MSL.
Add Examples for existing blocks #2

Some blocks did not have corresponding examples. These are added.
Remove not functional block for isMonotonic #2

The model previously commited was not working. It is therefore removed
with this commit.
Add 2 examples to functions #2

This commit adds examples for isMonotonic and trapezoidalIntegration
functions. The example model for trapezoidalIntegration works with a
integrands consisting only of integer values. For another set of
integrands of format Real the numerical error seems to be quite large.
This second example is included in the model but commented out.
Correct html errors in Math #2

The blocks for RegNonZeroPower and PowerLinearized contained wrong html in
the documentation, to which the unit tests gave errors. This is
corrected.
Add unit tests for Average and Polynominal #2
Add unit test for trapezoidalIntegration #2
Update unit test TrapezoidalIntegration #2
Add unit test for isMonotonic #2
Update unit test for IsMonotonic #2

The unit test includes only Booleans. Therefore, plotting results is not
straightforward. This version plots one of the test functions, which is
not ideal.
Modified Unit test for TrapezoidalIntegration

Now the unit test plots the result of the function call
trapezoidalIntegration
Removed plotting of variables.

This is for #2.
Corrected malformed html
Revised comments.
Changed icon as the other one will be removed.
Replaced icon as the previous base class will be removed in future versions of the MSL.
Updated icon.
Added info section.