Check numeric presence settings for NaNs.
Check numeric presence settings for NaNs.

Add wrappers for setting numeric properties on presences that checks
validity, especially for NaNs and infinite values. Should fix #353 for
all the known ways of triggering the issue.

sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata