Update readme with mailing list info
Merge branch 'hotfix/0.2.1'
Update changelog
Update cargo
Update abstract

Since v0.2.0 it's possible to log the messages.
Merge branch 'release/0.2.0'
Update changelog
Update version in cargo config
Merge branch 'feature/log-file'
Update changelog
Fix warnings
Add logging when env var supported

You need to specify LOG_DIR environment variable in order to log
messages to the directory.

The messages are stored on day basis to the file of the format
Update gitignore
Add how to think about wschat section to readme

Resolves: #1
Reformat readme
Merge branch 'hotfix/0.1.2'
Update cargo version
Update changelog
Set listening port to 80