Further new features.

Added support for creating changelogs from GitHub (for Spring Data Build project). A lot of internal refactorings, strengthening the domain model. Moved project declarations into Projects class. Made types package protected where possible.

Added dedicated TrainIteration type as well as a Shell Converter implementation to allow this type to be handed into the command implementations.

Unified logging into separate component to make sure we have consistent output.

pom.xml

@@ -61,6 +61,12 @@
 			<version>1.12.4</version>
 			<scope>provided</scope>
 		</dependency>
+		
+		<dependency>
+			<groupId>org.springframework.plugin</groupId>
+			<artifactId>spring-plugin-core</artifactId>
+			<version>1.0.0.RELEASE</version>
+		</dependency>
 
 		<dependency>
 			<groupId>org.springframework.boot</groupId>