dict version of path mapping
renamed pathmapping to path_mapping
minor code layout change
support for multiple hosts. use os.path.join to combine local base path
with sub path.
removed unnecessary rstrip. (open_file is probably not called with
remote basepath without the trailing dir sperator. if it is, strip the
separator from mapping when it is parsed into settings)
merged deluge 1.3.11; improved open_file