Feature request: provide support for chkfloat functionality

The chkfloat package is a small package that tries to check if a float is placed too far away from its (main) callout (ie its place in the source). As such I think this is a useful functionality but if done in a separate package that hooks into both the float mechansin and the caption mechanisn means that it isn't working the moment something like newfloat or the caption package is loaded as well. I therefore think it would be better handled by newfloat, float or caption directly.