IDE: employ cheat sheets Eclipse facility

[eparovyshnaya]

We need to lower the barrier to entry for a developer, who wishes to employ Passage for one's product.

One of steps here is to provide set of suitable cheat sheets.

In the scope of this task:

• necessary infrastructure work should be done: new bundle(s) should appear, bound to a (new?) feature, appended to (new?) aggreagator.Here (new?) choises can mean new (related) tasks for Releng component
• empty Passage-cheat-sheet should appear

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An article regarding the matter.

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Just for documentation:
#561557 - declare licensing requirement for OSGi @component
#561558 - declare licensing requirement in a bundle manifest

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Version: 0.8.0
Ported from bugs.eclipse.org: 561556