v0.14.3 Resolve compile error on 16bit systems & add 'ether_payload' & 'ip_payload' methods to SlicedPacket

What's Changed

• Add 'ether_payload' & 'ip_payload' methods to SlicedPacket types by @JulianSchmid in #88
• Enable build for 16 bit systems by @JulianSchmid in #94
• Update version to 0.14.3 by @JulianSchmid in #96

Full Changelog: v0.14.2...v0.14.3