Refactoring with new package

Api Contracts renamed
Api implementations renamed and refactored
Proxy Api improvements
Documentation in progress

Author: GoodforGod

src/main/java/io/api/core/IBlockProvider.java

@@ -1,10 +1,10 @@
-package io.api;
+package io.api.etherscan;
 
-import io.api.core.impl.EtherScanApi;
-import io.api.model.Tx;
-import io.api.model.TxInternal;
-import io.api.model.TxToken;
-import io.api.model.UncleBlock;
+import io.api.etherscan.core.impl.EtherScanApi;
+import io.api.etherscan.model.Tx;
+import io.api.etherscan.model.TxInternal;
+import io.api.etherscan.model.TxToken;
+import io.api.etherscan.model.UncleBlock;
 
 import java.util.List;
 import java.util.Optional;

src/main/java/io/api/core/ILogsProvider.java

@@ -1,7 +1,7 @@
-package io.api.core;
+package io.api.etherscan.core;
 
-import io.api.error.ApiException;
-import io.api.model.*;
+import io.api.etherscan.error.ApiException;
+import io.api.etherscan.model.*;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
@@ -13,7 +13,7 @@
  * @author GoodforGod
  * @since 28.10.2018
  */
-public interface IAccountProvider {
+public interface IAccountApi {
 
     /** Address ETH balance */
     @NotNull Balance balance(String address) throws ApiException;