Fix issue 194.



git-svn-id: http://nvidia-texture-tools.googlecode.com/svn/trunk@1383 95f4ed2b-212e-0410-8b90-d31948207fce
Fixes issue 204.


git-svn-id: http://nvidia-texture-tools.googlecode.com/svn/trunk@1384 95f4ed2b-212e-0410-8b90-d31948207fce
Fixes issue 202.


git-svn-id: http://nvidia-texture-tools.googlecode.com/svn/trunk@1385 95f4ed2b-212e-0410-8b90-d31948207fce