ADATS / NancyInternalConfiguration Improvements

[grumpydev]

ADATS will, by default, only include assemblies that have a reference to a nancy assembly.

ADATS will allow user to specify assemblies to include in the type scanning.

(note: the above two changes will not affect dependency scanning, which uses TinyIoC's autoregister, although this may link into #733)

NancyInternalConfiguration will lose the properties/methods to do with excluding assemblies - they don't make a whole lot of sense anyway as they're instance based and the scanner is static.

NancyInternalConfiguration structure will change so to defer any scanning until the types are needed - currently when the class is constructed it scans for several types of collections, which is a waste of time if they're overridden.

[thecodejunkie]

Scanning changes in #953 is left before we can close this. As #953 is assigned to 0.17 so is this

[thecodejunkie]

Apparently I wasn't allowed to close this yet! =D

[khellang]

Can't this be closed?