Add INBOUNDS macro

I mean, I probably should've done this earlier, but using this saves on
typing and improves readability.

desktop_version/src/UtilityClass.h

@@ -13,6 +13,8 @@ std::vector<std::string> split(const std::string &s, char delim);
 
 bool is_positive_num(const std::string& str);
 
+#define INBOUNDS(index, vector) ((int) index >= 0 && (int) index < (int) vector.size())
+
 
 //helperClass
 class UtilityClass