NSIS 2.x doesn't know the unicode switch and chokes, 3.07 defaults
it to true as well.
As there doesn't seem to be a graceful way to handle 2.x versions,
we have to remove the unicode switch and the warning in 3.x (< 3.7)
installers shall be ignored.
# http://nsis.sourceforge.net/Docs/Modern%20UI%202/Readme.html
#
-# Fix warning 7998: ANSI targets are deprecated
-Unicode True
-
# Include the "Modern UI" header, which gives us the usual Windows look-n-feel.
!include "MUI2.nsh"