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

[Maciej Komosinski]

• add f4 tests with invalid genotypes (to test problematic parsing, valgrind)
• add f1 tests to see if introducing GeneProps? did not change the calculation of properties (and detect the 'm' bug!)
• implement approximate, fast, very low and constant complexity coloring in f4 (styles) just like it is done in f1
• oper_f4.cpp:137 maybe move all modifier definitions to one location
• oper_f4.cpp:178 address this TODO
• f4_general.cpp:478 address this TODO
• "default move control to neuclasshandler" unclear meaning
• same: "error: if no previous"
• same: "Need to check if exists"
• same: "they belong to neurons"
• same: "tc3 is only to ensure that in the end of neuron parameter definition"
• check: sprintf((char*)buf2.c_str(), "%d", i1); and all other similar use cases
• makeNull() never used?
• char count; repetition counter - TODO discuss the CHAR type
• f4_general.h from line 160 upwards. Fix English, merge (remove spaces) * (pointer) with variable names or type names when there is no variable name