ADDED fromGlob() and DELETED Pulling.molname()

Can now readily load multiple experimental files, either as a file
list or in a shorthand glob form. You only need the basename or
str file; it will look for fret files automatically if they are
not specified.

Experiment.fromGlob('SJF4','s1m1')
Experiment.fromFiles(filelist)
UPDATED fromGlob() to fromMatch() for readability