librnd 4.1.0
~~~~~~~~~~~~

Major API extension release. The two new APIs are:

1. font2: an upgraded font engine with support for baseline, kerning,
   multiline text, horizontal and vertical alignment, tabs, &entity;

2. polybool: first phase of the poly lib rewrite; the new API is largely
   compatible with the old poly API

Further notable new features:

3. the file selection dialog optionally allows multiple files to be selected
   for read (available in the gtk HID)

4. DAD API extended for: moving widget focus, communicate coord-per-pixel
   value to expose application callbacks in a reentrant way, make xflip/yflip
   of preview widgets accessible to application code, multi-select option in
   gtk tree-table widget, generic 'timed update on change' infra