This Qualification / Proper Naming

JNA package only -> Fully qualify with 'this'.  Remove remainder of
underscores from names.  Additional cleanup to make clear for local
variables that hid class instance variables.  Setters which is clear to
intent, just use 'value' rather than name that hides instance variable.

Added missing quote in waffle-mixed demo.
Found Base64 missed in prior switch to guava, switched it.