Added TimerDemo to 001-basic-threading.
Added SwingTimerDemo to 001-basic-threading
Added 002-concurrency-utils to concurrency module.
Added AtomicCounterDemo to 002-concurrency-utils.
Added ExecutorDemo to 002-concurrency-utils.
Cleaned up ExecutorDemo in 002-concurrency-utils.
Added FileCounter to 002-concurrency-utils.
Cleaned up ExecutorDemo.
Added SwingWorkerDemo to 002-concurrency-utils.
Added security module and 001-basic-security project.

+ SecurityDemo
GroupLayout example.
Added the patterns module and the Strategy example.
Added the Observer (custom implementation).
Renamed 002-observer to 002-observer-custom and added 003-observer-jdk.
Modified incorrect keywords section.
Added Decorator example.
Added description to 004-decorator.
Added 005-decorator-with-sizes.
Added 006-decorator-java-io.
Simple Factory Idiom example added.

commons-lang has been added to the patterns module pom.