Add a method to retrieve a bean by (interface) class on ComponentManager

As per http://hippo.2275632.n2.nabble.com/HstServices-getComponentManager-vs-HstFilter-getClientComponentManager-td7580345.html I would like to be able to retrieve a component based on it's interface.

This is common in Spring as well by using: context.getBean(SomeInterface.class).

Woonsans reply in the thread was:
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I think it will be useful to add #getComponentOfType(Class<T>) or #getComponent(Class<T>) in ComponentManager. It can throw exception when there are multiple beans. This seems necessary especially when using auto annotation scanner feature of spring anyway.
Feel free to create a jira issue for this improvement.
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Personally I would go for the last option: #getComponent(Class<T>), but either is fine I suppose.