project: added project skeleton

Skeleton includes emtpy implementations of application class structure.
Source groups were added to CMakeLists to define filters in Visual Studio.

src/lib/data/Edge.cpp

@@ -0,0 +1,13 @@
+#include "data/Edge.h"
+
+#include "data/Node.h"
+
+Edge::Edge(std::weak_ptr<Node> from, std::weak_ptr<Node> to)
+: m_from(from)
+, m_to(to)
+{
+}
+
+Edge::~Edge()
+{
+}