Remove dead code previously left in by mistake.

Add error message for invalid datatype of transition condition. Generalize datatype narrowing algorithm for transition conditions.

merge

closed temporary fix branch

Check VAR_EXTERN variables declared in FBs instantiated in a Program (and recursively too - FBs in FBs).

Fix typo in as yet dormant code (related to REF_TO keyword, that is not yet active)

Fix compilation error on platforms where real64_t is mapped onto 'long double'

Correctly handle structured variables that include FB and external FBs (example: FB1.FB2.extFB3.FB4.extFB5.extFB6.structvar.field1 := 42;) (this commit fixes only ST code. TODO: IL and SFC)

Remove call to type_is_complex() in ST code generation.

A little code cleanup (reduce number of possible variable generation states)

Finish: Change order of SET_xxx() macros. (this will allow me to simplify the print_setter() methods later on)

Change order of SET_xxx() macros. (this will allow me to simplify the print_setter() methods later on)

More static declarations in POUS.c in order to avoid conflicting symbol definitions with new POUS.c inclusion scheme

Fix multiple resources support, POUS.c now only contain static definitions. POUS.c is included in configuration C code as well as in resources to allow GLOBAL FBs to be declared in configurations