Fixed #28 "Code formatting" by applying IDEA default code formatter

Issues: #28
Fixed #27 "Running the build with IDEA 12.1 jars fails tests"

* added missing reference to PlatformUltraLiteTestFixture
* added missing dependency to idea.jar and trove4j
* upgraded pom.xml to use intellij 12.1.0
* upgraded project.version to 1.0.7
* added changelog link to plugin.xml

Issues: #27