Add Slider module
Resolve confict!
Add Placeholder module! Resovle syntax warnning!
Reformated demo\js\index.js! And add Placeholder module!
Deleted the duplicated parameter!
Merge branch 'dev' of https://github.com/guoyao/graceful-web-ui into dev

Conflicts:
	Gruntfile.js
	demo/js/index.js
	js/tests/index.html
changed location of some files!
Changed some varibles!
Merge pull request #10 from alfredzh/dev