Subpixel

This is a merge of the version I use in my own code with master.

Adds:
1) Subpixel methods on images.
2) Some PixelTools methods.

Removes PGP configuration from build scripts; it is better to have this in your home directory.
The reason: As it was set up, it required me to have keys, even just to do a publishLocal.

Also bumped some versions.