Implements #1139
Conflicts:
	src/main/java/com/jaeksoft/searchlib/webservice/AbstractDirectoryImpl.java
	src/main/java/com/jaeksoft/searchlib/webservice/autocompletion/AutoCompletionImpl.java
	src/main/java/com/jaeksoft/searchlib/webservice/crawler/webcrawler/RestWebCrawler.java
	src/main/java/com/jaeksoft/searchlib/webservice/crawler/webcrawler/WebCrawlerImpl.java