This change updates the WTF trace reader to support the new streaming
trace API.

This change updates the SWF trace reader to support the new streaming
trace API.

This change moves Bitbrains trace support into a separate module and
adds support for the new trace api.

This change extracts the Parquet helpers outside format module into a
new module, in order to improve re-usability of these helpers.

This change updates the code for the Bitbrains trace reader and upgrades
the TraceConverter to re-use existing code of the Bitbrains trace
reader.

This change adds an implementation of Parquet OutputFile for local files
in order to eliminate the dependency on the entire Hadoop system. This
implementation allows users to read Parquet files locally without
needing a Parquet filesystem implementation.

This change updates the format implementations that use Parquet by
switching to our InputFile implementation for local files, which
eliminates the need for Hadoop's filesystem support.

This change updates the project structure to become flattened.
Previously, the simulator, frontend and API each lived into their own
directory.

With this change, all modules of the project live in the top-level
directory of the repository. This should improve discoverability of
modules of the project.