Plugin version 1.0 changes 9

+Saving functionality completed for plugin 0.0 and 1.0, including
separate/embedded code in XML file (only for v1.0).
+Changes in plugin metadata fully implemented.
+Changed methods and objects names for clarity inside PluginEditor.cs
(metadata related) from previous commits.
+Changed some comment from header of PluginTemplate.cs to have the same
names as metadata equivalents.