Added TRIBITS_VERBOSE_PRINT_VAR() and use in examples

To remove some of the clutter of the example CMakeLists.txt files, I created
the new function TRIBITS_VERBOSE_PRINT_VAR() to get rid of the if statement.
Now the testing aspects of these examples are not so intrusive.
Adding option <Project>_DUMP_LINK_LIBS

I also changed the print to:

   <targetName>:LINK_LIBS='...'

Now you can just dump the link libs and not do a full verbose configure.
Changed name of MixedLang lib to 'mixedlang' to match name change
Added tips on regular expressions
Updated generated docs.