fixed clearDisplay(), changed linebreak to \n and added basic example

example/display/basic/basic/basic.ino

@@ -0,0 +1,17 @@
+#include "Dezibot.h"
+
+Dezibot dezibot = Dezibot();
+void setup() {
+  // put your setup code here, to run once:
+  dezibot.begin();
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  dezibot.display.print("Hello from\nDezibot!");
+  delay(5000);
+  dezibot.display.clear();
+  dezibot.display.print("Bye!");
+  delay(5000);
+  dezibot.display.clear();
+}