Integration into the build

This release mainly implements #3. You can now integrate the plugin into your build.

   <build>
        <plugins>
            <plugin>
                <groupId>org.openhab</groupId>
                <artifactId>binding-docu-generator</artifactId>
                <version>0.1.2</version>
                <executions>
                    <execution>
                        <id>docu-generation</id>
                        <phase>package</phase>
                        <goals>
                            <goal>generate-docu</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

The workflow changed:

1. Plugin checks if there are any mustache template files or downloads them.
2. If all template files are present we start parsing your ESH-INF/ directory.
3. Since all data is present we can now start the generation of your readme.
4. We save the readme file in your local filespace.