Massive cleanup

- Removed GuildConfigs repository, moved to extensions
- Moved StreamSettings extension to GuildConfig extensions
- namespace NadekoBot.Core has been simplified to NadekoBot in many places (more to come)
- Replaced some raw delete queries with simple linqtodb queries

src/NadekoBot/Modules/Searches/Common/BibleVerses.cs

@@ -1,6 +1,6 @@
 using Newtonsoft.Json;
 
-namespace NadekoBot.Core.Modules.Searches.Common
+namespace NadekoBot.Modules.Searches.Common
 {
     public class BibleVerses
     {