#358 Update EncryptionMethod to new interface

- Add new methods to the EncryptionMethod interface
- Delete temporary interface (NewEncrMethod)
- Remove temporary checks and casts to NewEncrMethod

src/main/java/fr/xephi/authme/security/crypts/SeparateSaltMethod.java

@@ -3,7 +3,7 @@ package fr.xephi.authme.security.crypts;
 /**
  * Common supertype for encryption methods which store their salt separately from the hash.
  */
-public abstract class SeparateSaltMethod implements NewEncrMethod {
+public abstract class SeparateSaltMethod implements EncryptionMethod {
 
     @Override
     public abstract String computeHash(String password, String salt, String name);
@@ -27,9 +27,4 @@ public abstract class SeparateSaltMethod implements NewEncrMethod {
         return true;
     }
 
-    @Override
-    @Deprecated
-    public boolean comparePassword(String hash, String password, String playerName) {
-        return false;
-    }
 }