this is necessary because in module type_io these pointers point to TVI_Normalized values that
could be overwritten by this function

argument fun_type of function determineProducers was changed by a record pattern match,
rename the argument to consumer_type

prevent crash when writing .tcl file with extensible algebraic types (not yet implement in the dynamic linker)

to prevent crash in collectVariables

to avoid abort in collectVariables for a BoundVar

allow integers and strings as consumer for generic functions (to optimize use of generic info).
use PR_CurriedFunction instead of PR_Curried for local macro functions that are good producers.
check the arity of the function to be generated already in determineProducer,
if too large, don't yield a producer which will be rejected later,
to allow optimization of producers in subsequent arguments.
optimize trivial function calls (with arguments) before optimizing arguments,
treat constant function as trivial function.
if a function call has two identical arguments,
generate a specialized function that shares these parameters.
specialize functions with zero arity constructor arguments,
if the function is a generic function, or the constructor is a generic constructor.

because the code generator swaps the fields in a FILE node

add generic case definitions in definition modules for the types used to make the generic representation,
in generic case definitions in definition modules specify what generic info and dependencies are used

add type constraints in constructors and function arguments with universal quantifier (from iTask branch)

fix name of type function

because the new functions in ti_new_functions must be in the right order.

										-

instead of only for first argument

change GenericInfo

of type or constructor arguments, for example: f :: Int ! -> Int or :: T = C Int *