Added .bm exception

[cj13579]

The IANA can't resolve .bm domains so I have added an exception and the whois server for .bm extensions. I have also added a test for a test .bm address:

PS C:\Users\cblake\Documents\Visual Studio 2015\Projects\Personal.python-whois> python .\pwhois --raw gov.bm > test/data/gov.bm
PS C:\Users\cblake\Documents\Visual Studio 2015\Projects\Personal.python-whois> python .\test.py run gov.bm
Missing target data for domain gov.bm. Run `./test.py update gov.bm` to correct this, after verifying that pythonwhois can correctly parse this particular domain.
PS C:\Users\cblake\Documents\Visual Studio 2015\Projects\Personal.python-whois> python .\test.py update gov.bm
Generated target data for gov.bm.
PS C:\Users\cblake\Documents\Visual Studio 2015\Projects\Personal.python-whois> python .\test.py run gov.bm
[1/2] gov.bm passed in normalized mode.
[2/2] gov.bm passed in default mode.
Timing in default mode: 22ms avg, 22ms min, 22ms max
Timing in normalized mode: 23ms avg, 23ms min, 23ms max
All tests passed!

Thanks for the awesome project!