added QTNETWORK lib link to cmake, refactored piqsl to use QTcpServer and QTcpSockets, removed threading, switched to QSharedPointers

Signed-off-by: Alistair Leslie-Hughes <leslie_alistair@hotmail.com>
Fixed indents by hand and removed ClientListener references.

Signed-off-by: Alistair Leslie-Hughes <leslie_alistair@hotmail.com>