Merge pull request #1 from cocoleecoco/0.2.0

Support for Sophia Smart Contracts

Author: danielgogo

.gitignore

@@ -0,0 +1,40 @@
+# Overview
+> Java SDK is a Java development kit for PlatON public chain provided by PlatON for Java developers.
+
+# Build
+```
+    git clone https://github.com/PlatONnetwork/client-sdk-java.git
+    cd client-sdk-java/
+    ./gradlew clean jar            //Generate jar package
+	./gradlew clean distZip        //Generate code generation skeleton tool
+   
+``` 
+
+# Use
+
+* config maven repository:  http://sdk.platon.network/content/groups/public/
+* config maven or gradle in project
+
+```
+<dependency>
+    <groupId>com.platon.client</groupId>
+    <artifactId>core</artifactId>
+    <version>0.2.0</version>
+</dependency>
+```
+
+or
+
+```
+compile "com.platon.client:core:0.2.0"
+```
+
+* use in project
+
+```
+Web3j web3 = Web3j.build(new HttpService("https://host:port"));
+```
+
+
+# Other
+[more reference wiki](https://github.com/PlatONnetwork/wiki/wiki)