Update on main logo

src/main/java/ui/JMenuBarTurtle.java

src/main/java/ui/MainGUI.java

src/main/java/ui/util/DefaultText.java

src/main/java/ui/util/IconManager.java

src/main/java/ui/window/JFrameBasicText.java

src/main/resources/ui/util/starting_logo.png

src/main/resources/ui/util/starting_logo.xcf

src/main/resources/ui/util/starting_logo_old.png