IDEX-878 change file type creation, add abuility to register several editor provider to same file type
Merge remote-tracking branch 'origin/master'

Conflicts:
	codenvy-ext-java/src/main/java/com/codenvy/ide/ext/java/client/JavaExtension.java
	codenvy-ext-web/src/main/java/com/codenvy/ide/ext/web/WebExtension.java
	codenvy-ide-core/src/main/java/com/codenvy/ide/core/StandardComponentInitializer.java
	codenvy-ide-core/src/main/java/com/codenvy/ide/core/editor/EditorAgentImpl.java
	codenvy-ide-core/src/main/java/com/codenvy/ide/core/editor/EditorRegistryImpl.java
	codenvy-ide-core/src/main/java/com/codenvy/ide/resources/ResourceProviderComponent.java
	codenvy-sdk-tutorials/wysiwyg-editor/src/main/java/com/codenvy/ide/tutorial/wysiwyg/WysiwygExtension.java
IDEX-878 change file type creation, add abuility to register several editor provider to same file type