Gleez Num v1.2.0

+ Num::toIPv4   - Get the IPv4 dotted format address from integer
+ Num::fromIPv4 - Get the integer value from IPv4 dotted format address
Merge pull request #718 from sergeyklay/feature-num

Gleez Num v1.2.0
Updated translation: Amended Russian
Fixed issue: Minor PHPDoc fix