Fixed
Use #entries for #ls

#ls does not need to exist in adapters anymore since it goes through
the file system object.  No longer use a Directory for storing
@internal_pwd; just use a String.
#entries should raise Rosh::ErrorNO* errors like remote_dir
Nuke extra line
Moved base specs to be for Shell
Got tests running again for local and remote shell adapters
Fixed directory names
Got service adapter specs running
Lots failing, but tests running again now