[DXCC id] Improved DXCC identification

[AndreasK79]

Improved DXCC identification.

Fix for call:

• R2FM/P - Kaliningrad, not Russia
• SM1K/LH - Sweden, not Norway, basically ignores /LH
• CX/PP8KW - Uruguay, not Antarctica (CX0 is Antarctica)

This included a call tester that can be run to check calls from your own log. A table with dxcc that are different between stored dxcc and what the algorithm says, will be shown if anything is found.

• cloudlog-url/calltester/db - checks all the calls in the database
• cloudlog-url/calltester/call - checks a lists of calls I compiled. Currently doesn't show anything, since they are identified correctly
• cloudlog-url/calltester/csv - checks a csv-file that contains callsign, dxcc(adif number), date (upload to /uploads)