fixed less compile error.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
remove backup file.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Merge pull request #115 from appleboy/patch-1

fixed less compile error.
fixed #116 less build error should stop gulp.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>