add serf, the new http lib used by svn
svn: support for neon webdav lib was removed, uses serf now
netsurf: fix scroll speed

addresses #131
upgrade qt4 to 4.6.4

5x as big as 4.3.4, however nothing builds against 4.3.
since newer versions are even more bloated (+50 MB for every major
release), 4.6 should be good enough to get most qt apps working.
linux.config: enable KVM and add some defaults

this page has further options that may be useful to turn on:
http://www.linux-kvm.org/page/Tuning_Kernel
eudev: allow access to /dev/kvm for kvm group
qemu: explicitly build with kvm support
add aqemu frontend
su: update to latest (fixes prompt display)
add qemu-kvm
X: add vesa driver
X: add nv driver
X: add modesetting driver
xorg.conf.d: load modules needed for nouveau
rc.local: add a device section

for some reason, the eudev stuff doesn't properly assign group
ownership. doing it directly saves a lot of nerves.
add slock, the suckless X screen locker
config.cache: globally disable the broken gnulib mktime configure check
gobject-introspection: bump to 1.38 (fixes build error)
add python-py2cairo
add python-urlgrabber