Use correct type of exception

Author: sleipnir

README.md

@@ -93,7 +93,7 @@ The second thing we have to do is add the spawn dependency to the project.
 <dependency>
    <groupId>com.github.eigr</groupId>
    <artifactId>spawn-java-std-sdk</artifactId>
-   <version>v0.7.0</version>
+   <version>v0.7.1</version>
 </dependency>
 ```
 We're also going to configure a few things for our application build to work, including compiling the protobuf files. 
@@ -127,7 +127,7 @@ See below a full example of the pom.xml file:
       <dependency>
          <groupId>com.github.eigr</groupId>
          <artifactId>spawn-java-std-sdk</artifactId>
-         <version>v0.7.0</version>
+         <version>v0.7.1</version>
       </dependency>
       <dependency>
          <groupId>ch.qos.logback</groupId>

pom.xml

@@ -4,7 +4,7 @@
     <groupId>io.eigr.spawn</groupId>
     <artifactId>spawn-java-std-sdk</artifactId>
     <packaging>jar</packaging>
-    <version>0.7.0</version>
+    <version>0.7.1</version>
     <name>spawn-java-std-sdk</name>
     <url>http://maven.apache.org</url>
 

src/main/java/io/eigr/spawn/api/Spawn.java

@@ -105,7 +105,7 @@ public ActorRef createActorRef(String system, String name, String parent) throws
      * </p>
      * @since 0.0.1
      */
-    public void start() throws Exception {
+    public void start() throws SpawnException {
         startServer();
         registerActorSystem();
     }