comment cleanup
Merge branch 'master' of https://github.com/Kalman85/Java-7-Concurrency-Cookbook

Conflicts:
	Java 7 Concurrency Cookbook/chapter01.threadmanager/chapter01/threadmanager/demo03_interrupt/Main.java
	Java 7 Concurrency Cookbook/chapter03.syn_utilities/demo05/phaser_tasks/FileSearch.java
	Java 7 Concurrency Cookbook/chapter03.syn_utilities/demo05/phaser_tasks/Main.java
	Java 7 Concurrency Cookbook/chapter03.syn_utilities/demo06/control_phaser_change/Main.java
	Java 7 Concurrency Cookbook/chapter03.syn_utilities/demo06/control_phaser_change/MyPhaser.java
	Java 7 Concurrency Cookbook/chapter03.syn_utilities/demo06/control_phaser_change/Student.java
	Java 7 Concurrency Cookbook/chapter03.syn_utilities/demo07/exchanger/Consumer.java
	Java 7 Concurrency Cookbook/chapter03.syn_utilities/demo07/exchanger/Main.java
	Java 7 Concurrency Cookbook/chapter03.syn_utilities/demo07/exchanger/Producer.java