Move Color class from libscgui to libsccolor

Makefile

@@ -1,7 +1,4 @@
-LDLIBS := -lscterm -lm -lscgui
-
-LDLIBS += $(shell pkg-config sdl2 --libs)
-CXXFLAGS += $(shell pkg-config sdl2 --cflags)
+LDLIBS := -lscterm -lm -lsccolor
 
 BIN := $(shell basename $$(pwd))
 

progress.cpp

@@ -2,7 +2,7 @@
 #include <ctime>
 #include <cstdlib>
 #include <libscterm.hpp>
-#include <libscgui.hpp>
+#include <libsccolor.hpp>
 
 void show_rows_cols(const sc::term& t) {
     std::cout << t.rows() << " rows, " << t.cols() << " cols\n";