'Dear Imgui' wrapper module for Oryol (https://github.com/ocornut/imgui)

Oryol sample: https://floooh.github.com/oryol-samples/asmjs/ImGuiDemo.html

First, add a new import to the fips.yml file of your project:

imports: oryol-imgui: git:https://github.com/floooh/oryol-imgui.git

Next, add a new dependency 'IMUI' to your app's CMakeLists.txt file:

fips_begin_app(MyApp windowed) ... fips_deps(IMUI) fips_end_app()

Run 'fips gen' to fetch the new dependencies and rebuild the build files:

> ./fips gen ...