[LMP] Try guessing encoding via libguess.

Probably fixes #1230.
Probably fixes #1272.
[Blogique] Export to Fb2
[Blogique Hestia] add export to Hestia
[VLC] wrong connect
[VLC] icons to titlewidget
[VLC] text improves
[VLC] kdevelop bugs
[LMP] Tags recoding options.

Tags recoding made optional; configurable tags recoding region.

Closes #1250.
[LMP] Wrote & use FindLibGuess.cmake.
[LMP] LibGuess made optional.
[VLC] normal dropping
[VLC] real normal dropping
[VLC] clearing code
[VLC] segfault on exit improved
[Util] Try to detect greenish color.

Probably fixes #1275.
[Azoth Xoox] Removed outdated comment.
[Azoth CH] Try detecting MUC messages.

Probably fixes #1277. Probably breaks everything, dunno.
[Util] Use app palette in FindNotification().
[Azoth] Avoid scrolling kludges.
[Azoth] Scroll via document.body.scrollTop property.