Merge pull request #18 from JeanFrancoisViaud/master

ArrowRelation CheckStyle
Add uml schema
Change before_install to before_script
Merge pull request #19 from chdemko/master

Add uml schema
Update ChangeLog
Check style for Lattice.java
Merge pull request #20 from chdemko/master

Check style for Lattice.java
CheckStyle for BijectiveComponent.java
Change Fields to private
Update ChangeLog