Merge julia plugin to main dev branch

PCIe plugin

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.!

Minor fixes

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

ChannelSelector improvements.

* Updated images for collapse/show button;
* Updated animations;
* Some other small UI improvements;
* Added possibility to collapse element by clicking "ESC" key
  either on the component itself or on the TextEditor.

* Created SlicerChannelSelectorComponent class which holds inside
  all ChannelSelector's parser related components and which
  takes responsibility for parsing selected range, etc.
* Added possibility to collapse parser related components.
* Added animations.
* UI improvements.
* Minor bugs fixes.

followed instructions by Christopher Stawarz in
https://open-ephys.atlassian.net/wiki/display/OEW/Plugin+build+files

Mac path changes

Set MACOSX_DEPLOYMENT_TARGET (i.e. the minimum supported OS X version) to 10.9.  Pass -Wpartial-availability to the compiler so it will warn about usage of API's that aren't available on all supported OS X versions.  Removed /opt/local and /usr/local from OS X header and library search paths, as they're used only by specific plugins and not needed generally.

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.

On OS X, the default data directory is now ~/Documents/open-ephys, which is created if it doesn't exist

merge from Development to Testing