GLFWError on windows but works fine on Linux on the same machine
**GLFWError on windows, but pyxel works fine on my Linux on the same machine**

i can't run pyxel on windows ,not even a simple window but it works fine under Linux on the same machine, i got the same problem with Windows 7 and Windows 10 too, although my Intel HD Graphics 3000 is properly installed under windows

**Screenshots**
![image](https://user-images.githubusercontent.com/14264086/50124622-c4e7f880-0265-11e9-86d0-1a20f9c1c0b5.png)


**Desktop :**
 - OS: Windows 10 64bit
 - Python: 3.7.1
