Update README#Running.
Update README#Running config description
Add config validation.
Fix bugs of config validation. Fix test/config.yaml according to the new rules.
Merge branch 'issue-13' into issue-39
Merge branch 'issue-13' into issue-39
Adjust API to run without authentication.
Merge branch 'issue-13' into issue-39
Create separate test config for ssl connection.
Reflect config changes in readme.
Merge pull request #39 from vogdb/issue-39

Config simplification and validation.