Removal of psqlodbc.vcproj from the list of ignored files in .gitignore

Hi all,

I noticed that psqlodbc.vcproj is ignored in .gitignore but it is
actually needed by project for Windows builds. I am assuming that this
file is kept in the code for convenience and for Windows builds at
each release as it is frequently updated/ Here is a patch making this
file not ignored in the git tree. This will protect from cases where a
developer does a git rm on it. By default you would not be able to
re-add it back.

Regards,
--
Michael