Ability to create full project structure using `bem create` command

Add techs that will add ability to run:

```
bem create -b my-project -T project # to create project directory
cd my-project/
bem create -b desktop -T blocks -T bundles # to create desktop.blocks/ and desktop.bundles/ levels
bem create -l desktop.blocks -b my-block -T examples # to create desktop.blocks/my-block/my-block.examples/ level
```