fixed build error with gcc 4.5.2

Merged with Edouard's modifications

Fix bug when debugging located variables of type memory (%M)

Removed dead code

Fixing implementation of CU, CD, and CUD in standard library.

Deleting dead code.

Merging changes.

Added tracking of order by which tokens are processed by lexical analyser.
This helps in correctly formating error messages when constructs begin in one file, and end in another.

Adding tracking of filename in which token is located.

Reverted semantic error message so that Beremiz can parse them and that user can double-click on error message to open related POU and select the faulty line.

Fixing error message incorrectly changed in previous merge.

fixing C code generation of return_statement_c and exit_statement_c

merging the Edouard's version.

fixing exit_statement_c: produce 'break' instead of 'exit(0); (Thanks to Manuele)

Fixing code generation of standard conversion functions.

Re-generated std lib related code, with updated headers, updated all forgotten headers

Merged matiec library headers update from Mario to LGPL

Changing to LGPL for library functions.

Updating origin and license info of library fuctions.
Conclude missing counter FBs.

Leave standard function names hardcoded, as these are considered keywords even though
they may not be implemented in the library.

New version of bistable.txt - due to license issues.

Make semantic error message compatible with beremiz

Merge

Fixes to make handling of standard functions in Semantic analyser compatible with code generation of standard functions

Merge with changes from Mario

Fixing stupid bug (that was disabling code generation).

Adding Makefile for Darwin (thanks go to Manuele)

starting to add proper header file with declaration of standard functions

Fixing error messages for IL semantic errors (brocken in a previous changeset/commit).

Updating license info (with Edouard's permission for relevant files).

Updating License info (with Edoaurd's permission for relevant files).

Adding some debug info

Do not crash when checking semantics of undeclared symbolic_variable.
NOTE: this update may have broken the printing of error messages
during semantic analysis of IL code.

Updating licensing information.

Error messages (stage3) now better identify the location of the error.

Adding debug conditional printf()s in stage 3.
Printing semantic error info to stderr instead of stdout.

Merging my Huge change with Edouards/Laurents version

Huge change.

Changed packing declaration in iec_types

Modify code generated for avoiding warning while compiling when configuration or resource don't have any global variable

Initial TIME support in debugger

Merged with Edouard's modifications

Bug with getter for pointed variables in accessors fixed

Added dumb SEMA?implementation

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