Remove un-needed sites.
Add SHARP/BLAST.
Add Woodgarston Farm.
Add POP, New Forest launch site.
Add Beacon Hill Launch site.
Add altitude values to existing launch sites.

Taken from Google Maps API.

Eg: http://maps.googleapis.com/maps/api/elevation/json?locations=51.51143,-1.38870&sensor=true
Merge pull request #2 from SUWS/customise-launch-sites

Customise launch sites