updated makefile for supporting different target architectures

use "ARCH=arch_name make"

restructured project folder, implementations and headers together under sources/

sources/GL_STUFF/UTILS/ResourceCache.cpp

@@ -0,0 +1,22 @@
+#include "ResourceCache.h"
+#include "ShaderMaker.h"
+
+ResourceCache::ResourceCache() {
+	images = map<string, GLuint>();
+	shaders = map<string, GLuint>();
+}
+
+GLuint ResourceCache::getImage(string path) {
+	if (images.count(path) == 0) {
+		images[path] = loadImg(&path[0]);
+	}
+	return images.find(path)->second;
+}
+
+GLuint ResourceCache::getShader(string vertPath, string fragPath) {
+	string mapName = string(vertPath).append(fragPath);
+	if (shaders.count(mapName) == 0) {
+		shaders[mapName] = ShaderMaker::createProgram(&vertPath[0], &fragPath[0]);
+	}
+	return shaders.find(mapName)->second;
+}