Make some updates for WebSearch

I have made some updates such as:
1. the copyrightsHolder key won't have "Copyright held by creator"
object
2. delete duplicated "Food Comment" key, which is the same thing with
"FoodComments" key
3. modify "Habitat" key to prevent that for any animals' habitat, the
object began with "Not Exist, ……" and delete useless whitespaces
between different habitats
adding some fields to xml parsing