Switch JSON parser from FlexJSON to Jackson
Use ContextMenuItem class
Merge branch 'contextMenuItem' of https://github.com/dejuknow/liferay-nativity into initial

Conflicts:
	java/src/com/liferay/nativity/control/win/MessageProcessor.java
	java/src/com/liferay/nativity/modules/contextmenu/ContextMenuControl.java
	java/src/com/liferay/nativity/modules/contextmenu/ContextMenuControlBase.java
	java/src/com/liferay/nativity/modules/contextmenu/mac/AppleContextMenuControlImpl.java
	java/src/com/liferay/nativity/modules/contextmenu/win/WindowsContextMenuControlImpl.java
	java/src/com/liferay/nativity/modules/fileicon/FileIconControl.java
	java/src/com/liferay/nativity/modules/fileicon/mac/AppleFileIconControlImpl.java
	java/test/com/liferay/nativity/test/TestDriver.java
	mac/LiferayFinderCore/ContentManager.m
	mac/LiferayFinderCore/RequestManager.m