MINOR More files to ignore.
MINOR Use 'squirrel.conf' on Linux.

Now we will read configuration from 'squirrel.conf' on Linux amd 'squirrel.ini' on Windows. The internal data is looking same, except the commentary symbols. However I believe that it is ugly to use .ini files on Linux.
MINOR Removed wildcards, this is too much.
DOC Added configuration files examples for Linux.