Diagram label grammar updated according to 968ea3c

DataInstanceUse returns DataInstanceUse:

	dataInstance=[DataInstance|EString]

	('(' argument+=ParameterBinding ( "," argument+=ParameterBinding)* ')' )?

	('.' reduction+=[Member|EString])*

	('.' reduction+=MemberReference)*

	//TODO: if for some reason the data instance use does have a name

	//it will cause problems... same applies for other scenarios 

	//TODO: create a more elegant way to handle that gracefully)

	//(name=EString)?

	;

MemberReference returns MemberReference:

	member=[Member|EString]

;

FormalParameterUse returns FormalParameterUse:

	parameter=[FormalParameter|EString]

	('(' argument+=ParameterBinding ( "," argument+=ParameterBinding)* ')' )?

	( "." reduction+=[Member|EString])*

	( "." reduction+=MemberReference)*

	;

FunctionCall returns FunctionCall:

	'('

	(argument+=ParameterBinding ( "," argument+=ParameterBinding)*)?

	')'

	('.' reduction+=[Member|EString])*

	('.' reduction+=MemberReference)*

	;

VariableUse returns VariableUse:

	'->'

	variable=[Variable|EString]

	('(' argument+=ParameterBinding ( "," argument+=ParameterBinding)* ')' )?

	("." reduction+=[Member|EString])*

	("." reduction+=MemberReference)*

	;

TimeLabelUse returns TimeLabelUse:

Interaction returns Message:

	sourceGate=[GateReference|EStringDot]

	('sends' | isTrigger=Trigger) 

	argument+=DataUse

	argument=DataUse

	'to' 

	target+=Target ( "," target+=Target)* 

	(

Target returns Target:

	targetGate=[GateReference|EStringDot]

	('where it is' 'assigned' 'to' variable+=[Variable|EString])?

	('where it is' 'assigned' 'to' variable=[Variable|EString])?

   	(

    'with'

    '{'

;

Block returns Block:

	('[' guard=DataUse ']')?

	('[' guard+=LocalExpression ']')?

	'{'

		behaviour+=Behaviour ( behaviour+=Behaviour)* 

	'}'

	;

LocalExpression returns LocalExpression:

	 expression=DataUse

;

CompoundBehaviour returns CompoundBehaviour:

	block=Block

;

BoundedLoopBehaviour returns BoundedLoopBehaviour:

	'repeat'

	numIteration=DataUse

	numIteration+=LocalExpression

	'times'

//	'from' startValue=DataInstanceSpecification

//	'to' endValue=DataInstanceSpecification