[Poshuku] Removed guard defines for older Qt versions.

We don't support pre-Qt 4.8 builds anymore anyway.
[Snails] Account for core API changes.
[Snails] Fixed OutputIODevAdapter vmime HEAD.
[Snails] vmime::ref -> vmime::shared_ptr.
[NSM] Always adjust account box to contents.
[CSTP] Handle UTF-8 content-disposition, fixes #1636.
[Util] Added Util::RegExp to sll/.
[Poshuku CW] Migrate to Util::RegExp.
[Util] RegExp is a metatype now.
[Util] Added serialization/deserialization to RegExp.
[Util] RegExp::RegisterTypes().
[XProxy] Migrate to Util::RegExp.
[Util] Register RegExp serializers via a global object.
[Util] Removed RegExp::RegisterTypes().
[LMP] Disable Potorchu by default (sucks anyway).
[LMP Potorchu] Git rid of GStreamer visualizations.

Buffer handoffs for now.
[LMP Potorchu] Added VisScene.
[LMP Potorchu] VisWidget is now a GL-based graphics view.
[LMP Potorchu] No need in GStreamer video library.
[LMP Potorchu] Use projectM.