Consider `::1` a private address
Consider `::` a loopback address

`::1` can be shortened to `::`.
Fix RegExp boundaries for private and loopback addresses
Merge pull request #10 from indutny/ipv6-private-loopback

Recognize more IPv6 addresses
0.3.1
Add support for /32 and /31 length subnet masks

- Add checks that the numberOfAddresses is greater than 2, otherwise
treat the broadcast and network addresses as first and last addresses.
- numHosts returns correct size to due to the first and last address
change for /31 and /32 networks.
- Add tests.

Make code fit 80 column limit.

Convert stray tabs to spaces