backup of zmq_stockpull files before merging with upstream
Merge remote-tracking branch 'upstream/master'

Refreshing from upstream, pulling in everyone's changes
modified run_plot to take length and start as optional arguments, adjusting the dates the plot displaed spans. new functions: .length()- returns length of object's stored date/item list; save_plot(filename, [len, start])- functions same as run_plot() but saves to filename
modified run_plot to take length and start as optional arguments, adjusting the dates the plot displaed spans. new functions: .length()- returns length of object's stored date/item list; save_plot(filename, [len, start])- functions same as run_plot() but saves to filename
Merge pull request #52 from lostorbit/master

modified run_plot, added two new functions