This fixes EOL conversions flagged by git 1.7.1 core.autocrlf=true. At this
point, neither git 1.7.1 nor 1.7.2 show any automatic CRLF normalization.
I think we're ready for another experiment.
There seems to be a difference in the handling of mixed line-ending files
between git 1.7.2 and older versions, when core.autocrlf is set to true.
This set of .gitattributes was automatically generated from the list of files
that GIT tried to normalize when I enabled automatic EOL conversion.
With this set of attributes, we prevent automated EOL conversion on files that
we know will cause trouble down the road.