Plugin Host

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3.4.0

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* No changes.

3.3.0

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* Broke pluginhost into pluginhost-base, pluginhost-config

pluginhost-base provides the core plug/unplug methods.

pluginhost-config provides support for constructor configuration

and static configuration of plugins.

* Added log statement if an invalid plugin is provided

3.2.0

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* No changes

3.1.1

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* No changes

3.1.0

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* Plugins now destroyed correctly, when host is destroyed.

3.0.0

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* Split out of "base" as a standalone module, for use by Node.