Fixed error message on broken frame

Corrected variable names in error message on broken frames.

Adding license information

Merge pull request #18 from Textalk/license

Adding ISC license.  Refs #13

Supporting huge payloads

Adding support for huge payloads, sending and receiving fragments.

Bugfix: Correcting address in error-message

Merge pull request #15 from QuentinBellus/master

Fixing full address in error

Add port in request-header

Bugfix: Add port in request-header.

Handling empty payloads

Fixing a bug from empty payloads.