While we're fixing warnings / errors, disable this (otherwise helpful) error because we are purposefully making this example file fail for this.

This test case had an error in both examples:
test_FindFunction_WhichIsBroken_ShouldReturnZeroIfItemIsNotInList_WhichWorksEvenInOurBrokenCode

It was supposed to be a list of values that are NOT in the list,
and none of them should be found.  It incorrectly included '1'

This test case had an error:
test_FindFunction_WhichIsBroken_ShouldReturnZeroIfItemIsNotInList_WhichWorksEvenInOurBrokenCode
It was supposed to be a list of values that are NOT in the list,
and none of them should be found.  It incorrectly included '1'
which is a value in the list.

The compile option -Wno-misleading-indentation was also added to
remove a compiler warning produced by gcc 7.3.0

If, longer term, the Travis-CI support for 32-bit is inconsistent
the lines that failed are:
 - make -s DEBUG=-m32
 - cd ../example_3 && rake
Add target 'ci' for building examples with -Werror

Delete clang flags that were disabled with -Wno-*

Primarily -
* Added "static" to static functions.
* Added proper signature with "void" to functions without arguments.
* Marked unused arguments with "(void)".
* Removed entirely unused static functions.
* Added "const" to preserve const-correctness.
* Added function prototypes for external functions.

 *  Simple makefile example, extracted from existing example