Add example output from the config_config tool

More obsolete stuff to delete

Delete more obsolete junk

Bump version to 0.2.1

Corpus example was messed up.

Training tips/best practices

Installable tools

Remove unnecessary SENTENCEPIECE_DIR

Update quickstart documentation

Bugfix to autoencoder path in config-config

Allow multiple autoencoder corpus paths

Inline examples in config-config documentation

Update config-config reference docs

Updated config for synthetic toy data

Code review fixes