Fixed some javadoc warnings.
HTML and Javadoc fixes, including adding classpath to ant Javadoc task.
use global properties for javac source/target versions. Fixed buildonlyglobal.
Bump to v3.0.0. Added release notes, made sure Javadocs ship in .jar file for user reference.
Fixed flagged likely bugs: unnec. iniializers, unused variables, etc.
Fixed all detected Javadoc issues.
Used IDEA Optimize Imports to fix 'unused import' warnings.
Unchecked cast fix in SortChooser, and some deprecated HTML tag removals in the help.