Fix the {geo,topo}.json of various Caribbean countries

[jamespwilliams]

• Add geojson and topojson for Sint Maarten (SX)
• Add geojson and topojson for the Caribbean Netherlands (BQ)
• Remove St Barthelemy from Guadaloupe geojson and topojson
• Set St Barthelemy's geojson and topojson to correct region

Links to previews of the files which have been changed are listed below, to make reviewing easier (Github has a nice topo/geojson viewer, but not in the "files changed" tab):

• https://github.com/jamespwilliams/countries/blob/master/data/bes.geo.json (added)
• https://github.com/jamespwilliams/countries/blob/master/data/bes.topo.json (added)
• https://github.com/jamespwilliams/countries/blob/master/data/blm.geo.json (fixed, moved from the location of SXM to the actual location of St Barthelemy)
• https://github.com/jamespwilliams/countries/blob/master/data/blm.topo.json (fixed, moved from the location of SXM to the actual location of St Barthelemy)
• https://github.com/jamespwilliams/countries/blob/master/data/cuw.geo.json (added)
• https://github.com/jamespwilliams/countries/blob/master/data/cuw.topo.json (added)
• https://github.com/jamespwilliams/countries/blob/master/data/glp.geo.json (fixed, removed St Barthelemy)
• https://github.com/jamespwilliams/countries/blob/master/data/glp.topo.json (fixed, removed St Barthelemy)
• https://github.com/jamespwilliams/countries/blob/master/data/sxm.geo.json (added)
• https://github.com/jamespwilliams/countries/blob/master/data/sxm.geo.json (added)

Fixes #407

[mledoze]

Great PR, thank you for your work, it's merged.