angle install on windows

* need Python3 (can install through win app store)
* need Windows SDK
* clone depot_tools git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git 
or download and unzip bundle at https://storage.googleapis.com/chrome-infra/depot_tools.zip 
* set depot_tools in path env variable through control panel>System and security>system>advanced system settings
* run gclient in a cmd shell

* set DEPOT_TOOLS_WIN_TOOLCHAIN=0
* mkdir angle
* cd angle
* fetch angle
* wait a million years

* fails when running python3 third_party/depot_tools/download_from_google_storage.py ...
  -> open DEPS and change third_party/depot_tools with ../depot/tools

* run gclient sync to complete previous step

* gn gen out/Debug
* gn args out/Debug and edit arguments:
	angle_enable_vulkan = false
	angle_build_tests = false
	is_component_build = false

* autoninja -C out/Debug
* wait a while

* link with libEGL.dll.lib and libGLESv2.dll.lib
* put libEGL.dll and libGLESv2.dll in same directory as executable