Properly ignoring /build
Added GSON 2.2.4
Added TraceData to Database support

TraceData can be written to a database for faster access through the
why scripts.

TODO: - Performance check
      - Add parameter to chose between DB and file output
Added GSON jar to compile classpath
TraceData fixes

- Fixed NullPointer when no tracedata available
- Fixed GSON serialization to string
- Added correct DB driver
- Added database credentials and URI
Added automatic TraceData truncation before writing new stuff
First PHP Why-Skript