Added LoopGroup support
Added LoopGroup support for Transaction
Merge branch 'master' of https://github.com/raycw/edidom

Conflicts:
	src/main/java/com/github/raycw/edidom/common/edifact/EdifactTransaction.java
	src/main/java/com/github/raycw/edidom/common/x12/X12Transaction.java