IDEX-1604 introduce VirtualFile interface, to be able to open files from different sources. Add navigation in project dependency jars
IDEX-1604 open class file in read only mode
Merge branch 'master' of github.com:codenvy/ide into javadoc

Conflicts:
	codenvy-ide-core/src/main/java/com/codenvy/ide/part/projectexplorer/ProjectExplorerPartPresenter.java
Merge pull request #384 from codenvy/javadoc

Javadoc