Changes in content, template (i18n) and configuration.

- Fix .gitignore;
- Update LICENSE;
- Update configuration;
- Some i18n changes from English to Estonian;
- Remove unused files;
- Fix content metadata and line breaks;
- Fix top menu and remove menu from sidebar.
Merge pull request #1 from gynter/fix-content-tpl-cfg

Changes in content, template (i18n) and configuration.