Update package flac

Update package flac to 1.3.0; both patches removed, as the issues have
been addressed upstream.  Also remove the dependency on libiconv,
since this is only used for the command-line frontend, not the
libraries. Finally, downloads have moved from SourceForge to Xiph.Org.
Update package x264
Update package openscenegraph
Update package imagemagick

Update imagemagick to 6.8.5-8. Also fix the update script (changed
website format).
Fix alure website URL
Fix armadillo website URL

Armadillo has its website at arma.sourceforge.net, whereas
armadillo.sourceforge.net is an unrelated (apparently inactive)
project.
Merge pull request #193 from uklauer/updates

Some package updates
Merge branch 'master' into multi-rebase