add button with user texture

add UserCallback to imgui_impl

imgui_demo clean-up

more ImDrawList API; user texture support

add CalcTextSizeA to ImFont

fix typo in PushStyleColor

add ImDrawList path functions

add ImDrawList channels

update CodePen link

update README with CodePen example

move enumerations into imgui.ts

hide mouse cursor when ImGui is drawing it

handle mouse cursor in example

fix a few errors in imgui_demo

fix memory editor address InputText

fix user data for InputText and InputTextMultiline

resize sandbox window

v1.60 WIP

add imgui native build to Makefile

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

fix slider display format in demo

add sandbox example

remove caching from dev server

add link to github project to README

invert mouse wheel direction

comment out local script tag

use deltaY instead of wheelDeltaY in wheel event handler