Moved "as" and "withName" from implicit to CSPOMExpression
Merge branch 'master' of https://github.com/concrete-cp/cspom.git

Conflicts:
	src/main/scala/cspom/variable/CSPOMExpression.scala
Merge branch 'master' of https://github.com/concrete-cp/cspom.git

Conflicts:
	src/main/scala/cspom/variable/CSPOMExpression.scala
Messing with previous merge now stands corrected