* Changed the order of plugin types at the enum definition.
* Changed some plugin definition names to be more user friendly and to
  be consistent with OE GUI.
* Removed "DataThread" plugin type from the "Plugin type" comboBox at
  the plugin creation page. Now to create DataThread plugin user
  should select "Processor" plugin type, then "Source" processor type
  and click "Use separate thread" button
* Removed possibility to create "Utility" processors plugins since we
  don't want to let users create such types of plugins.
* Removed possibility to generate editor and content component files
  for non-processor plugins since this feature was redundant.
* Removed "Plugin" page from "Config" for non-processor plugins since
  they have no built-in parameters.
* Added missing LookAndFeel related files to stage.
* Refactoring.

* Added ParametersEditor;
* Some improvements of Parameter class;
* Added possibility to generate code for parameters;
* Added possibility to save/load parameter in the project file.
* Other major and minor improvements.

* Fixed some problems with build due to the symbol redefinitions (It's
  still need to be reviewed and we need to find a better way for doing
  this);
* Added plugin properties in the configuration and adding the
  possibility to change it on the fly (still WIP);
* Added visual component to select the appropriate tab in the plugin
  configuration;
* Some cleanup;

* All modules are replaced with the JUCE 4.2.1 ones;
* Introjucer was replaced by Projucer;
* Also some appropriate needed fixes for Makefile.plugins;
* Removed -fvisibility=hidden flag for Linux building.