DSM: stylistic updates for code and configuration

[sevntu-checkstyle]

• change package to org.sevntu or com.github.sevntu
• append to repository checkstyle config and eclipse formatter.
• provide description to README file
• make a version like X.Y.Z - http://mojo.codehaus.org/versions-maven-plugin/version-rules.html
• update version to 1.1.0 for FreeMarker vrsion of plugin
• gitignore should not contain .project and .classpath
• Eclipse project configuration should be in repository to be reused between developers, but should not appear in result jar.

[sevntu-checkstyle]

fixed.