Multiple issues with f4 to fix each one independently, discuss when needed

[Maciej Komosinski]

1) unify modifier macros between f1 and f4?
2) still true? #define F4_MODIFIERS_VISUAL "" //not supported in f4
3) fix  Geno_f4::style, old pieces of code remain and clash with new
4) still needed?
	double       state;            ///<state of neuron
	double       inertia;          ///<inertia of neuron
	double       force;            ///<force of neuron
	double       sigmo;            ///<sigmoid of neuron

5) out of line comment?
// a collection of cells, like Organism, for developmental encoding


and another
// convert f4 geno string to tree structure (internal)


6) unclear in parens:
@return 0 if repair can be performed, -1 otherwise (the repair flag wasn't set in constructor)

7) int min, int max -> int mn, int mx

8) @param current parent of the analysed branch of the genotype
there is no "current" arg?

9) notation everywhere:
double * v -> double *v
const char * parse() -> const char* parse()

[Maciej Komosinski]

In 767:

More strict parsing of the repetition counter; bug fixes; improved docs [refs #62]