tslint

add button with user texture

add UserCallback to imgui_impl

move enumerations into imgui.ts

hide mouse cursor when ImGui is drawing it

handle mouse cursor in example

resize sandbox window

v1.60 WIP

allow imgui_impl.ts to be used externally

clean up SystemJS configuration

allow canvas to capture keyboard and mouse events

pass canvas to impl; honor io capture flags

add sandbox example

invert mouse wheel direction

comment out local script tag

use deltaY instead of wheelDeltaY in wheel event handler

fix bind-imgui.js path

import project