v0.7.0-dev.0

The set of changes in this release are relatively small, and are as follows:

• The former gortctl commands have now been integrated into gort.
• If the database section is missing from the configuration file, Gort will automatically use an in-memory data store. This is intended entirely for trialing and development!
• Several significant under-the-cover improvements to the core adapter logic.
• Fixed race conditions in config/config.go and dataaccess/dal-singleton.go.
• As always, more (and better) tests.