Several features are missing

[remyzorg]

• add first class machines (necessary)
• maintain signals values or presence informations between steps
• gathering operators at signal definitions (several emission of the same signal at the same instant
• pre
• n-ary parallel operator and/or gathering (at signals definition)

[remyzorg]

• add first class machines (necessary)
• maintain signals values or presence informations between steps
• gathering operators at signal definitions (several emission of the same signal at the same instant
• pre
• n-ary parallel operator and/or gathering (at signals definition) (Canceled)