Added some hiking paths on a circular route around Causey Pike, and a few roads in the area. Improved the accuracy of other roads.

Some of the paths, though public footpaths, were pretty tricky climbing, so I tagged with appropriate sac_scale. I'm still not totally happy with choosing whether to use highway=footpath, footway or path for such paths. I'm not sure whether the current recommendations for tagging hiking paths work well with representing public rights of way, but I'm not sure I have any better ideas. Perhaps the rendering needs to be thought about a little more.

Looks like there are many other footpaths and bridleways in the area yet to be mapped.