Adding missing support for accessors and retain in configuration files (Bug and fix reported by Manuele Conti)

Merged with modifications from Edouard

Task single parameter code generation broken after addition of accessors fixed.

Bug when function call result is a parameter of another function call fixed.

A forgotten case in type size getter switch prevented debugging outputs.

merge

Adding support for generating code for variable in step action association instead of action

Updated makefiles for cygwin build with no perl

Bug with global located variables accessors fixed

Bug with code generation of global located variables in resource fixed thanks to Mario

Bugs fixed:
- S and R operators using C++ literals
- Function block output assignment code generation

Bug when parsing standard function block call in IL

Bug when trying to get type of elements in a big complex structure fixed

Adding support for using arrays in POU interface

Using InOut variables in functions fixed

Bug on generate_c_inlinefcall fixed
Adding support for using structures in POU interface

Using function_call_iterator in generate_c_inlinefcall instead of creating a new visitor

Bug on standard functions called with literals fixed
Checking that number of parameters in function call doesn't exceed the maximum

Adding support for making distinction between external variables and located variables for forcing

Adding support for forcing global without perturbation from setting external

Bug in located variable initialization code fixed

Bug on SFC debugging fixed
Adding support for forcing transition state

Adding support for setter and getter on complex datatype in IL

Changes merged

Adding support for setter and getter on complex datatype in ST

Fix accessor code

type definition to match accessor and new debug

fixed cygwin build - still slooooooooow

Adding Flags bit symbols

Adding support for flags on Function Block variables for marking which variable must be debugged, retained or is forced