Change target to where flag is on Edinburgh Castle.
Move script into <head> and initialise on body load.
Pass around layer for adding pubs instead of whole map
Make circle editable with L.CircleEditor.js
Fix bug in CircleEditor
Replace _markers array with individual points for centre and circumference
Tidied up a bit
Renamed centerMarker to _centerMarker
More simplification / tidy up
Maintain position of circumference handle relative to center when moving center.