add support for sass, less and stylus css preprocessors
terse up logic and fix extension typo
Merge branch 'style-preprocessors' of https://github.com/akre54/generator-thorax into style-preprocessors
Sass, Less & Stylus support

- Added tests for each
- Fixed an issue where an end bracket was being output
Refactoring style preprocessor tests

- Dynamic styleOption variable fed into generator build
- Tests nested under parent Style Processors
Merge pull request #29 from 'style-preprocessors'

- Merging style-preprocessors into master
- Tests merged and passing