Delete debian/patches/fix-for-lib-names.patch:
it is not required anymore due to recent changes in upstream.
Revert "Disable build of BitTorrent plugin."

This reverts commit 010cc5e3ac74f9c07ad0a1009997f24baec91bfe.
Rename libleechcraft-xmlsettingsdialog0.3.0 to libleechcraft-xsd0.3.0.
Update debian/rules:
update the list of available plugins in configure options.
Delete package leechcraft-otlozhu.
Use xz compression for packages instead of bzip2.
Tiny fix in debian/rules.
Update debian/copyright.
Update debian/rules: use system qxt library.
Bump Standards-Version to 3.9.4 (was 3.9.3): no changes required.
Small fix in debian/copyright.
Fix debian/leechcraft-dev.install.
Update debian/leechcraft-core.install.
Update build dependencies.
Add leechcraft-dumbeep package.
Update descriptions of packages in debian/control.
Update source package using `wrap-and-sort -sa`.
Update build and runtime dependencies.