Update gitignore for current dev tools.

- Ignore IntelliJ files.
Update pom, add retrofit and fest deps.
Push version to 0.2.0, use semantic versioning.
Rename ServiceManager to Tmdb.
Port everything to retrofit, drop unneeded files and classes.
Drop unused enumerations.
Drop unused Response entity.
Fix some API annotations for movies service.
Create simple tests for all existing movies endpoints.
Add debug flag to base test case, by default false.
Update readme and change log.
Merge branch 'retrofit' into dev
Merge branch 'release-0.2.0'