Implement slash commands

Update JDA to 5.0.0-alpha.18
Simplify commands by removing aliases and usage
Remove prefix config option
Separate skip and voteskip commands
Add new shuffle command
Remove duplicate crypto commands

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.xtremcommunity.discord</groupId>
     <artifactId>netneutrality</artifactId>
-    <version>1.0.0</version>
+    <version>2.0.0</version>
     <name>netneutrality-discord-bot</name>
     <description>Discord bot</description>
     <packaging>jar</packaging>
@@ -108,7 +108,7 @@
         <dependency>
             <groupId>net.dv8tion</groupId>
             <artifactId>JDA</artifactId>
-            <version>4.4.0_350</version>
+            <version>5.0.0-alpha.18</version>
         </dependency>
 <!--        <dependency>-->
 <!--            <groupId>com.sedmelluq</groupId>-->