this should work as very simple filter for one channel. The global var is shared between channels atm so it behaves weirdly on multi-chaannel data

very early alpha  -  this still has a lot of hardcoded paths etc.!

Added implementation of ExampleEditor destructor (so ExampleProcessor plugin will load if compiled).  Removed OS X settings from ExampleProcessor Makefile.

On OS X, the default directory for files explicitly saved/loaded by the user is now ~/Documents/open-ephys.  Added CoreServices::getDefaultUserSaveDirectory(), which returns ~/Documents/open-ephys on OS X and the current working directory on other platforms.

this should reduce the impact of the remaining 1px plot issue until we
track it down

non plugin specific class defs should not go into the plugin specific namespace