Deletes all files with the following extentions
that are dated before the current date.
SPC, BV1, GF1, CHK, TV1, NBB, NBT, EDC, EDB, EDT
EDS, SAB, SBV, TMP, BK!
Also deletes all files starting with $.
Useage 'Clrdrive Startpath'
Will search all subdirectories and remove files.
Reports total files deleted and space saved.