moved savitzky_golay to smoothing plugin
removed smoothing from lineshapes plugin
rearranging smoothing routines
refactoring smoothing plugins
refactoring (in progress) feffit with uncertainties
fix typos/bad imports
added (slightly altered version of) scipy.optimize.leastsq into minimizer
moved satizky_golay code
rewrite of smooth to support x/y arrays -- needs more testing
fix divide-by-zero for kaiser bessel window
deleted random.lar module
fix typo
remove show from valid_commands in builtns.py -- moved to plugins/std/show.py
add group2dict / dict2group functions, now using initializeLarchPluging
read_ascii():  allow and ignore blank lines