- Add Open mailbox link in the Renderer tools
- Fixes few warnings.
Conflicts:
	src/main/java/com/jaeksoft/searchlib/util/JsonUtils.java
	src/main/java/com/jaeksoft/searchlib/webservice/autocompletion/RestAutoCompletion.java
	src/main/java/com/jaeksoft/searchlib/webservice/crawler/database/DatabaseImpl.java
	src/main/java/com/jaeksoft/searchlib/webservice/crawler/database/RestDatabase.java
	src/main/java/com/jaeksoft/searchlib/webservice/crawler/rest/RestCrawlerImpl.java
	src/main/java/com/jaeksoft/searchlib/webservice/crawler/rest/RestRestCrawler.java
	src/main/java/com/jaeksoft/searchlib/webservice/script/RestScript.java
	src/main/java/com/jaeksoft/searchlib/webservice/script/ScriptImpl.java
	src/main/java/com/jaeksoft/searchlib/webservice/stopwords/RestStopWords.java
	src/main/java/com/jaeksoft/searchlib/webservice/stopwords/StopWordsImpl.java
	src/main/java/com/jaeksoft/searchlib/webservice/synonyms/RestSynonyms.java
	src/main/java/com/jaeksoft/searchlib/webservice/synonyms/SynonymsImpl.java
Merge pull request #1146 from emmanuel-keller/1.6

- Add Open mailbox link in the Renderer tools