Determine if an IP address is within a private block before setting server:public_ip_* or server:private_ip_* machine tag.
Bump version to 1.0.4.
Use ipaddress gem to determine if IP address is private.
Merge pull request #15 from rightscale-cookbooks/st_14_15_acu182511_validate_ip_before_setting_tag

St 14 15 acu182511 validate ip before setting tag