chore(locationPhotoShare): start new example

This example will rely on location server when getting positions of
other clients and when building bar.
feat(picShare): add locational drop areas

Drop areas represent locations:
   Ahead, Left, Right, Behind
chore(img): rename photos and arrow images for compass

Rename photos to start from 0
Add arrows starting from 0 as well
chore(compass): make compass with variable dimensions

Width and height are not hardcoded, they are variables
chore(img): move images to right

In fullscreen mode, images were overlapping left bar, so we move them.
chore(picShare): minify position calculation on drag
feat(picShare): draw location bars when clients updated
feat(picShare): add sharing ability to example
Merge branch 'feat_location_photo_sharing'

Add example with fake location server. This example supports up to 4
clients connected at the same time. Clients can deterime and show
positions of other clients relative to itself.