Added Include folder

*facepalm*

include/cmd/cmd_echo.hpp

@@ -15,7 +15,7 @@ namespace fsh {
         virtual void run(std::istream& in, std::ostream& out, ArgManager& args) override {
             std::string s;
             std::string o;
-            while (getline(in, s)) { o += s + "\n"; }
+            while (std::getline(in, s)) { o += s + "\n"; }
             out << o;
         }
     };