Qwt 6.1.0

[Uwe]

Qwt 6.1.0 is available.

A short summary of the changes can be found at:
http://qwt.sourceforge.net/qwtchangelog.html

Qwt 6.1 is intended to be compatible with Qt >= 4.4 and Qt 5

A designer plugin ( Qwt lib statically inside ), compatible with the
official binary packages of the Qt Creator 2.7 for Windows, is available
as binary.

Uwe