Updated AreaEntity class

Fixed confusing name TODO and simplified.
Deleted class : ComposedArea

No more supported.
Updated AreaEntity class

Added default constructor, and extended BaseEntity.
Updated World class

Updated constructors to match the previous modification on the
AreaEntity class
Updated World Class (minor)
Uploaded NoEffectArea for further modification

This area is supposed to be the 'idle' area. It does not affect
entities.
Merge branch 'master' of https://github.com/sebastienjean/iutvalence-java-mp-2013-2014-ie1-p4.git