Allow for an optional ADDE error code.
Updated .gitignore; ignore "*.iml" files.
Regression to solve spurious lines problem seen on some ATI graphics:
Don't allow RenderingAttributes WRITE capability.

Don't allow geometry byRef write capabilty: must be used with GeometryArray.updateData
which isn't currently implemented.
Merge pull request #34 from tomrink/master

Regression to solve spurious lines problem seen on some ATI graphics:
Remove subversion details from README.
Add missing Every Nth range constant [1587]
Merge pull request #35 from tommyjasmin/master

Add missing Every Nth range constant [1587]