#137 - Extracted TemplateVariable into separate class.

TempalteVariable is now a standalone class. Introduced TempalteVariables wrapper to allow easy collecting of TempalteVariable instances and rendering them in the shortest possible way.
#126 - Prepare 0.9 release.

Updated change log so far. Upgraded to latest dependency versions. Polished porject information in pom.xml. Added Spring dependencies that we directly depend on. Adapted test cases to changes in Jackson 2 output format. Updated ChangelogCreator to latest milestone and repository URI.