Add getch() implement without conio.h

ConsoleUI/ColorUI.cpp

@@ -1,12 +1,49 @@
 #include "ColorUI.h"
 
 #include <algorithm>
-#include <conio.h> // getch
 
 #ifdef _WIN32
 #include <Windows.h>
+#include <conio.h> // getch
 #else
 #include <cstdio> 
+/// Fix getch() without conio.h
+#include <termios.h>
+
+struct termios _old, _new;
+/* Initialize new terminal i/o settings */
+void initTermios(int echo)
+{
+	tcgetattr(0, &_old); /* grab old terminal i/o settings */
+	new = old; /* make new settings same as old settings */
+	new.c_lflag &= ~ICANON; /* disable buffered i/o */
+	new.c_lflag &= echo ? ECHO : ~ECHO; /* set echo mode */
+	tcsetattr(0, TCSANOW, &_new); /* use these new terminal i/o settings now */
+}
+/* Restore old terminal i/o settings */
+void resetTermios(void)
+{
+	tcsetattr(0, TCSANOW, &old);
+}
+/* Read 1 character - echo defines echo mode */
+char getch_(int echo)
+{
+	char ch;
+	initTermios(echo);
+	ch = getchar();
+	resetTermios();
+	return ch;
+}
+/* Read 1 character without echo */
+char getch(void)
+{
+	return getch_(0);
+}
+/* Read 1 character with echo */
+char getche(void)
+{
+	return getch_(1);
+}
 #endif
 
 namespace _cns