Mindsdb

Features:
- `config['api']['mysql']['database']` can be used as custom mindsdb-database name for db-integrations.
- update argument for executable function
- removing corrupted predictors on start

fixed:
- logging in main process
- convertation to JSON of numpy types in prediction results
- removing datasource on initial analyse fail
- checking columns names in DS for unique
- 'delete datasource' route
- a lot of other fixes

Fixes:

- Changed Scout url opened by browser
- Changed gui paths for js and css

Features:
- serve Scout from root `/` instead `static/`
- change http api location from root `/` to `api/`
- open browser page with Scout on MindsDB http interface start
- most part of fields in custom config is not required to run anymore.

Fixes:
- fix using MindsDB directly from mysql console client
- various fixes

Note:
All predictors trained before this release will be moved to `{storage_dir}/obsolete/predictors`, since they cant be used in newer versions.

Hotfixes:

- Scout address will be in terminal output at any logging level.
- fix for `AccessDenied` error at OSX

Features:

- Improves for logging and console output
- Remove no longer needed config fields

Fixes:

- should be fixed issues related to ssl-cert valid from date.