Maven compile and target version changed to 1.7 (#40)

Author: sunilkhedar

README.md

@@ -32,7 +32,8 @@ For documentation, visit [https://dev.ost.com/](https://dev.ost.com/)
 ### Installation
 
 #### Maven users
-##### Add this dependency to your project's POM:
+
+Add this dependency to your project's POM
 ```xml
 <dependency>
   <groupId>com.ost</groupId>

pom.xml

@@ -116,8 +116,8 @@
         </dependency>
     </dependencies>
     <properties>
-        <maven.compiler.source>1.6</maven.compiler.source>
-        <maven.compiler.target>1.6</maven.compiler.target>
+        <maven.compiler.source>1.7</maven.compiler.source>
+        <maven.compiler.target>1.7</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     </properties>