Implement .gitignore whitelist paradigm.

.gitignore

@@ -1,3 +1,17 @@
-cmake-build-debug/
-cmake-build-release/
-.idea/
+/**
+!/bin/**
+!/cmake/**
+!/etc/**
+!/include/**
+!/media/**
+!/resources/**
+!/sql/**
+!/src/**
+!/test/**
+!.gitignore
+!.CMakeLists.txt
+!COPYING
+!Doxyfile
+!README.md
+!todo_1.4.md
+!uid_fix_concept.md