Some breaking changes were introduced lately, it's better to note that current version is not 3.7 anymore...

The Raylib root Makefile for PLATFORM=PLATFORM_WEB is assumed to
run in Windows environments, which makes it incorrectly set the
PATH variable, so Linux (and possibly other) environments are not
able to find binaries from EMSDK_PATH.

Fix this by checking which PLATFORM_OS and configure PATH
accordingly.

* updated README.md

* fixed CMakeLists.txt to allow building and debugging with Visual Studio Code and CMAKE Tools extension

* added PLATFORM_DRM
contains mouse pointer code from https://github.com/chriscamacho

* removed redundant cleanup in InitGraphicsDevice

* fixed DRM connector mode selection

* added choosen DRM connected mode to log output

* added respecting TargetFPS on DRM mode selection, default to 60

* added support for GetMonitorRefreshRate

* changed SUPPORT_MOUSE_CURSOR_RPI to SUPPORT_MOUSE_CURSOR_NATIVE

* changed avoidProgressive to allowInterlaced

* cleanup, function extraction and improved mode selection

* README reverted to original for PR

* line endings fixed for core.c

* removed old code

* mouse pointer reverted to small square

* replaced SetGraphicDeviceName() by DEFAULT_GRAPHIC_DEVICE_DRM

Co-authored-by: kernelkinetic <kernelkinetic@outlook.com>

This is the recommended way

When using USE_PTHREADS=1 on libraylib.bc compilation, program requires --shared-memory passed to the linker and despite it compiles, it fails on execution (at least for me).

Review raylib resource file for DLL compilation

It can be useful in some cases qhen compiling for multiple architectures

When you install emsdk out of the box, the directory is no longer `$(EMSDK_PATH)/python/33.7.4_64bit` but rather `$(EMSDK_PATH)/python/3.7.4-pywin32_64bit` noting the `3.7.4-pywin32_64bit` change on the last file.

Thus, without adjusting this in the raylib Makefile it will throw an error:

```
PS C:\raylib\raylib\src> make PLATFORM=PLATFORM_WEB -B                                                                  emcc -c core.c -Wall -D_DEFAULT_SOURCE -Wno-missing-braces -Werror=pointer-arith -fno-strict-aliasing -std=gnu99 -Os -s USE_GLFW=3 -I. -Iexternal/glfw/include -Iexternal/glfw/deps/mingw -DPLATFORM_WEB -DGRAPHICS_API_OPENGL_ES2              '"python"' is not recognized as an internal or external command,                                                        operable program or batch file.  
```

However, changing this line in the Makefile compiles raylib for web as expected

`"raylib library generated (libraylib.bc)!"`

Co-authored-by: Branlix 3000 <branlix@3000.3k>

- Removed generate_android_toolchain, since version r21 AndroidNDK it's the toolchain
 - Removed external lib native_app_glue, provided by AndroidNDK

This reverts commit 2528854664.

* Update compilation warning flags

Removed the -Wall flag that allow many warnings and added manually all the warning flags that don't generate warnings in the src/external folder.
Specifically, these are some of the flags reporting errors in src/external:

-Wmissing-prototypes
-Wunused-variable
-Wunused-value
-Wunused-parameter
-Wunused-function

* Uptade compilation flags in examples with missing -std=c99

Corrected issue on web compilation

Note that emscripten upstream branch implements the new asyncify implementation, expected to be faster than emterpreter one.