more myList and *ed static imports

I changed the static import command lines in all the Utilities classes
to generalized static imports, i.e. individual method static imports
have been replaced by general class imports with "*"s, e.g. "import
static REALDrummer.MessageUtilities.*;".
In myList, I also implemented some key methods like add(), find(),
get(), and the contains[...]() methods. I also added and implemented
lowestValue(), lowestValuedNode(), highestValue(), highestValuedNode(),
isLeft(), and isRight().