Use block template for rendering blocks.
Added missing variable region_id in theme hook, adapted template
Removed region.id() from layout region template
Merge pull request #15 from md-systems/block-template

Use block template for rendering blocks. Will document/fix block weight in follow-up.
Merge pull request #16 from md-systems/theming-improvements

Provide region_id as a default class for the layout region template
Split blocks and subregions rendering into separate methods; switch to a unified content variable in region hook_theme/template
Switch from sizeof to count; remove camelCased variable names
Merge pull request #17 from frega/split-region-block-rendering

Split blocks and subregions rendering into separate methods; switch to a...
Minor refactoring/reroll to reflect new traits