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vector functions.

giving warnings about this I switched to the replacement function
XkbKeycodeToKeysym().

namespace into the normal dlib:: namespace so that code which works
with both sparse and dense vectors is more cohesive.

This change runs into a bug in visual studio 2005 that I can't seem
to find a way to avoid.  Might try it again later, but for now, I'm backing
it out.

in the data.