Implemented dynamic metadata lookup
Retrieve ctx metadata through dynamic operator

Is it nicer? good question.
Projections file for easier vim nagivation
Support for nested 'describe'

Previously, you could not have a 'describe' inside a 'describe'. This is now
possible, and you can differentate between describing a feature, and describing
the context in which the feature is tested.

It currently has no practical meaning, but it can help making the specs more
explicit.
Implemented ? operator on TestContext
Updated readme file
Renamed TestContext.add to set
Implemented context.tryFind
Changed members to upper camel case

Standard F# naming conventions
Changed TestContext.T to TestContext

Makes it more natural for client code adding extensions to the context.
Updated readme file
Merge remote-tracking branch 'origin/master' into refactor-test-reporting

Conflicts:
	core/DomainTypes.fs