added new symbol for plugin usage.

Related to issue karlitrotski/CodingSpectator/#13

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added case PluginMonitor to OperationDeserializer

Related to issue karlitrotski/CodingSpectator/#13

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New class initialized.

New class's constructor added to methods that start when eclipse starts

Related to issue karlitrotski/CodingSpectator/#13

Pair Programming with @karlitrotski