refactoring

- fix complex method
- fix code style
- split klass.js -> klass.js / klass-constructors.js / klass-utils.js
- fix compiler
- fix names of klass.utils
- fix $SC.Class -> $SC
- update grunt-jscs-checker
- build v0.0.17
Merge pull request #25 from mohayonao/code-cleanup

refactoring