Remove local glfw3 lib for osx. (+1 squashed commit)

Squashed commits:
[34cc3b7] Adds osx example. (+6 squashed commits)
Squashed commits:
[20330f2] Uses glfw by brew install.
[0427861] Renames imguiex folder name to imguiex-ios
[f9e27e5] Renames ios_example to apple_example.
[44f8fe3] Updates the glfw header/library path.
[919f279] Renames target from imguiex to imguiex-ios since there is already a imguiex-osx target now.
[24395f5] Adds osx example.

examples/apple_example/imguiex-ios/debug_hud.h

@@ -0,0 +1,25 @@
+//
+//  debug_hud.h
+//  imguiex
+
+#pragma once
+
+typedef struct DebugHUD
+{
+    bool show_test_window;
+    bool show_example_window;
+    float rotation_speed;
+    float cubeColor1[4];
+    float cubeColor2[4];
+} DebugHUD;
+
+#if __cplusplus
+extern "C" {
+#endif
+
+void DebugHUD_InitDefaults( DebugHUD *hud );
+void DebugHUD_DoInterface( DebugHUD *hud );
+
+#if __cplusplus
+}
+#endif