Qt 5.11.2 rebuild

1.1.0-4

update ci to 5.11.2

Qt 5.11.1 rebuild

1.1.0-3

fix tavis

Qt 5.11.0 rebuild

1.1.0-2

update to 5.11

First CI release

First release with CI builds. Changelog:

• made reader backend reentrant
• internal code cleanups
• bundle libpng/libz on all platforms, unless pkg-config is used
• automatic pkg-config detection

initial release

1.0.0

update png script