Removed useless parenthesis for optional elements
Removed useless () parenthesis for *
Renamed Multiplied/divide operators
Grammar beautifying
Fix for range keyword vs range grammar rule
Choice fix
Removed useless/duplicate rules
Merge pull request #2 from sebx86/master

Removed useless parenthesis for optional elements 	88b18d0
Removed useless () parenthesis for * 	c63e7f9
Renamed Multiplied/divide operators 	4d68330
Grammar beautifying 	cfd2c75
Fix for range keyword vs range grammar rule 	0c72ac0
Choice fix 	95252f0
Removed useless/duplicate rules  	bba36a1