* Fix#995 ICategoryChannel.CategoryID throws NotSupportedException
* Add tests
* change run mode of TestChannelCategories
* Add throw for GetCategoryAsync
* Add xml doc explaining why exception is thrown
* Add test coverage for text and voice channel categories
* initial implementation of INestedChannel
* more implementation of INestedChannel design
* Add case in RestChannel Create for Category type
* set the CategoryID for RestVoiceChannel
* rewrite channel category tests to work with existing pattern
* remove outdated todo
* Make IVoiceChannel implement INestedChannel
* remove redundant interface implementation
* Add c#7 feature from feedback
* Remove redundant GetCategoryAsync methods from socket entities
* Added configureawait to async methods
* change signature of interface GetCategoryAsync
* Add check for cachemode in rest channel GetCategory
* remove redundant IGuildChannel interface from ITextChannel and IVoiceChannel
* Update deps, fix test warnings.
* Support ns2.0
* Fix typo
* Remove ns1.1 support
* Net.Http and Net.Websockets.Client are not needed in ns2.0
* Move to net46 per volt
* Remove ns1.3 constants
* Changed Guild#DefaultChannel to resolve the first accessible channel
Resolves#776
This change is inline with hammerandchisel/discord-api-docs#329
RestGuild#DefaultChannelId is now obsolete and will throw a
NotSupportedException.
* RestGuild#DefaultChannelId will fall back to the guild ID
Adding an exception here would be a breaking change, so this was agreed
to fall back to the previous behavior, which would just return the guild
ID.
