Make plugins configurable
More plugin loading changes
Plugin changes to match configuration changes
Fluent binding changes
Changes to bring the sample code up to speed
Some IoC improvements (CallbackWhenRegistered)

The Unconventional attributes moved to CoreCross
Some automated resharper work
Value converters done conventionally
One conventional attribute change. The rest Resharper
Fixups after the conventional and value converter changes
Plugins working with new IoC registration - including value converters
Sample fixups after changes
More sample Fixes for conventional and plugin changes
Merge branch 'v3' of github.com:slodge/MvvmCross into vNextDialog

Conflicts:
	MvvmCross_All.sln