net_utils: added same_ipv4_network & Public Suffix List
net_utils: test IP & ipList for IPv4, warn if not

tightened up parens (style guide)
replaced a "throw" with logerror
export 'net' instead of 'isIPv4', consistency
net_utils: renamed to remove CamelCase

getOrganizationalDomain -> get_organizational_domain
isPublicSuffix          -> is_public_suffix
checkPublicSuffix       -> check_public_suffix
loadPublicSuffixList    -> load_public_suffix_list

added usage examples in docs/NetUtils.md
net_utils: added same_ipv4_network & Public Suffix List
net_utils: test IP & ipList for IPv4, warn if not

tightened up parens (style guide)
replaced a "throw" with logerror
export 'net' instead of 'isIPv4', consistency
net_utils: added tests
net_utils: replaced example with usable one
Merge pull request #480 from msimerson/public_suffix_list

net_utils: added same_ipv4_network & Public Suffix List