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Fix to a bug in implicit bindings where there were sometimes multiple instances from a CrossContext implicit binding. Includes test
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MediationBinder now Mediates Views 'bottom-up' so that more deeply nested Views receive injection first.
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first step towards solving context removal and management in a better way. Support  removal of first context
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Merge pull request #77 from WillzZz/dev

Fix bug from removal of firstContext
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Merge branch 'implicitfix' into dev