Added samples for annotation processing article. (#705)

* Added annotation processing examples. Fixed core-java8 build on OS X

* Moved projects to separate submodule

core-java-8/pom.xml

@@ -1,9 +1,10 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
+
     <groupId>com.baeldung</groupId>
+    <version>1.0.0-SNAPSHOT</version>
     <artifactId>core-java8</artifactId>
-    <version>0.1-SNAPSHOT</version>
 
     <name>core-java8</name>
 
@@ -111,6 +112,9 @@
     </build>
 
     <properties>
+
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
         <!-- logging -->
         <org.slf4j.version>1.7.13</org.slf4j.version>
         <logback.version>1.0.13</logback.version>