去掉statment的 return
Merge branch 'master' of https://github.com/javamonkey/beetl2.0

Conflicts:
	src/org/beetl/core/statement/ForStatement.java
	src/org/beetl/core/statement/PlaceholderST.java
	src/org/beetl/core/statement/SafePlaceholderST.java
	src/org/beetl/core/statement/StaticTextASTNode.java
	src/org/beetl/core/statement/VarRef.java