add Grunt files #57

Two grunt files
- `Gruntfile.js`
- `package.json`
Test Sass file
- `main.scss`
Test Output file
- `main.css`
add grunt sass plugin

- add all modules needed
- create appropriate `Gruntfile.js` and `package.json`, so the sass
  plugin can be ran
- move styles to sass in `dzogchen/` theme
Merge branch 'master' of github.com:coubeatczech/dzogchen-web into i57
add documentation for `sass` to readme
add grunt watch #57
delete test files #57
Merge branch 'master' into i57

Conflicts:
	.gitignore
Merge pull request #105 from coubeatczech/i57

I57