Merge pull request #85 from alexkay/master

Add Spek to the list of projects that use MXE
update package libsigc++
update package armadillo
upgrade package lapack
update package postgresql
update package gnutls
update package libpng
update package ffmpeg
update package dbus
update package armadillo
update package sqlite
Add Spek to the list of projects that use MXE
Merge branch 'stable'
Fix historical leftover in tutorial
Merge branch 'stable'
update package libxml++
update package curl
package curl: enable ipv6
new package wget

Though not a library, wget is useful because it is often used by
applications.
package wget: remove non-options