"hugo new" should be more quiet

When one types hugo new foo/bar.md it produces output that looks like

Content "/Users/eax/svn/blog/testblog/content/cases/bar.md" created

which is helpful but not quickly automatable to open. In particular it prevents

vim -- $(hugo new foo/bar.md)

from open the file.

I suggest dropping the words "Content" and "created" along with the quotes so that one can use the above shortcut.

I'm open to requiring a flag for this but don't think there is enough value in the non-scripted case to warrant adding a flag.