Backported jssl/network/ipv4/Address from ip.js
Backported jssl/network/ipv4/Mask from ip.js
Backported jssl/network/ipv4/Pool from ip.js
Backported jssl/network/ipv4/Subnet from ip.js
Added jssl/mixins/NumberCapsule
Backported jssl/network/ipv4 test suite from ip.js
Cleaning