debug readme with example

    ../src/UnstructuredMesh/UnstructuredMesh.h \

    ../src/UnstructuredMesh/UnstructuredMesh.h \

    ../src/NumericStaticArray/Vector.h \

    ../src/NumericStaticArray/Vector.h \

    ../src/NumericStaticArray/Vertex.h

    ../src/NumericStaticArray/Vertex.h

DISTFILES += \

    ../src/Debug/README.md

## The debugging tool ##

The headder Debug.h contains debugging macros that

simplifies the output from the program.

The macros can export almost any variable type.

Example:

```

#include "[[path]]/src/Debug/Debug.h"

#include <vector>

#include <map>

#include <string>

using namespace std;

struct InnerData {

    std::vector<char> s = {'h','e','l','l','o'};

};

MAKE_ATTRIBUTE_TRAIT(InnerData, s);

struct Data {

    int data = 42;

    InnerData d;

};

MAKE_ATTRIBUTE_TRAIT(Data, data, d);

int main(int argc, char* argv[])

{

    std::vector<std::string> list = {"This is", "absolutely awesome", "debugger!"};

    std::map<std::string, std::vector<int>> map = {{"odd", {1,3,5}}, {"even", {2,4,6}}};

    DBGVAR(list, map, Data());

    DBGCHECK;

    DBGMSG("Almost at the end of the program");

    DBGCHECK;

    DBGTRY(std::vector<int>({1,2,3}).at(4))

}

```

Result:

```

== ..\DBGTEST\main.cpp << 24 >> [[ list ]] ==> [ "This is", "absolutely awesome", "debugger!" ]

== ..\DBGTEST\main.cpp << 24 >> [[ map ]] ==> [ { "even": [ 2, 4, 6 ]}, { "odd": [ 1, 3, 5 ]} ]

== ..\DBGTEST\main.cpp << 24 >> [[ Data() ]] ==> { "data" : 42, "d" : { "s" : [ "h", "e", "l", "l", "o" ] } }

-- ..\DBGTEST\main.cpp << 25 >> ==> "check line" <==

++ ..\DBGTEST\main.cpp << 26 >> ==> "Almost at the end of the program" <==

-- ..\DBGTEST\main.cpp << 27 >> ==> "check line" <==

!! ..\DBGTEST\main.cpp << 28 >> ==> "something went wrong in try block: vector::_M_range_check: __n (which is 4) >= this->size() (which is 3)" <==

```