Remove shit bring in d25b60c156d7742cf0080a9478eca1c83b7a5808
my gulp-gh-pages PR has been merged (& released this time)

Ref 63a9af67dfa3a2b864191c1222e92375aad8e29c
Remove bloody-grid since we are happy with suit-grid
Use a sync rimraf to prevent gulp-clean async issue

Close #152
Create server & watch only after dist is done

This is to prevent
- 404 if the server start before `pages` task is done
- multiple livereload during the initial `dist` task