[NTG-context] The windows minimal exe installer

[Yue Wang]

Hi,

For automatic environment setup, I think there are two values should
be changed for better directory support:

TEXMFCNF -->  ...\texmf\web2c (why did it find texmf-local/context on
my machine ?)
TEXMF  ---> {...} // add values like texmf-fonts, texmf-project,
texmf-extra, etc. defined in setuptex.bat.

Yue Wang