Ensure factsets endpoint unescapes any delimiters

The delimiter #~ is reserved so we escape it on storage. Previously we had not
been removing the escaping from this field before returning it to the user,
this patch remedies that.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #1024 from kbarber/maint/master/unescape-delimiter

Ensure factsets endpoint unescapes any delimiters