Improves closing of resources, review of "try finally" code blocks
Conflicts:
	src/main/java/com/jaeksoft/searchlib/index/WriterLucene.java
	src/main/java/com/jaeksoft/searchlib/template/TemplateAbstract.java
Merge pull request #284 from emmanuel-keller/master

Improves closing of resources, review of "try finally" code blocks