Changes:

There are several internal and API changes in this release.

API changes

Added new feature Source Resolver allowing for custom command sources.
Added new platform support for Velocity the proxy API in minecraft
Added tab-completion of parameter's formats (e.g: <number>).
ONLY if the parameter doesn't have ANY type of suggestion resolvers.
Removed Platform specific resolvers/processors e.g: BukkitResolvers
Added interface TypeSuggestionResolver for specific suggestion resolvers that are linked to a type, while refactoring the original SuggestionResolver to accept only one generic type parameter (e.g: SuggestionResolver<S>) and refactored the overloaded static method SuggestionResolver#plain into SuggestionResolver#type making it return TypeSuggestionResolver.
Added static method SuggestionResolver#plain to return plain SuggestionResolver.

Renamed UsageContextMatch to CommandDispatch
Added internal default resolvers of various types for minecraft-related platforms.
BUG-FIX: fixed a bug where the command tree wasn't identifying flags as nodes during dispatching.
Removed SimpleAutoCompleter and AdvancedAutoCompleter making AutoCompleter a class instead of being abstract.