Added ImageJ patch to disable OSX shortcut & menu integration.
* added / changed shortcuts :
  - F1 : general help
  - F2 : duplicate view
  - F3 : global search
  - F4 : internalize/externalize view
  - Ctrl+F4 : close view
  - Ctrl+O : open an image file
  - 0 : disable view synchronization group
  - 1 : enable/disable view synchronization group 1
  - 2 : enable/disable view synchronization group 2
  - 3 : enable/disable view synchronization group 3
  - 4 : enable/disable view synchronization group 4
  - Shift+1 : global view synchronization group 1
  - Shift+2 : global view synchronization group 2
  - Shift+3 : global view synchronization group 3
  - Shift+4 : global view synchronization group 4
  - Shift+0 : cancel global view synchronization
  - Shift+G : grid tile viewers in grid
  - Shift+H : horizontal tile viewers arrangement
  - Shift+V : vertical tile viewers arrangement
* added support to launch a plugin at startup from the command line.
* added support to open an image from command line.  
* added IcyFrame.dispose() method to ensure frame close and release.
* use now Ctrl key on MAC OSX for mouse modifier as Cmd key is
interpreted by JVM as right mouse button modifier.
* tweaked plugin installation process (faster when many plugins need
to be installed or updated).
* tweaked sequence dimension operation (should be faster and consume
less memory).

* added new splash screens :)
* severals bug fixes.