8038732: [javadoc] NetBeans IDE target does not build doclets
Reviewed-by: jjg, jlahoda

7191449: update copyright year to match last edit in jdk8 langtools repository
Reviewed-by: jjh
Contributed-by: steve.sides@oracle.com

7150579: Moved ant code into a separate package, anttasks.
Summary: To allow langtools to be built without ant, the ant tasks were moved to a separated package. The packages were also renamed to proper lower case package names.
Reviewed-by: jjg