Implement #new long form

[Mouvedia]

#new @type name { }

//anonymous
#new @type { }

//@container
#new @container name { }
//is equivalent to
#new name { }

//anonymous @container
#new @container { }
//is equivalent to
#new { }

//multiple elements
#new @container elementA & elementB { }
//is equivalent to
#new elementA & elementB { }

If a non-container object is used it enables type specific properties in the block.

• & notation
• implement long form for @container elements
• support long form for other type of elements