Program to filter tags

This program impemts a median filter and interpolates the data to the
required framerate
Programs to combine tags on the same time scale

createfilteredtagdata takes the raw tag data and creates the filtered
and interpolated tag data for a single monkey's (given by monkeyid) tags

combinetags2monkey takes the filtered and interpolated tag data for a
single monkey and combines them into a single track (on a single
timeline).