fix(gitignore): move from bzrignore

since this project is on github now it should be a gitignore file
fix(configure.ac): you must check for lib64

this fixes the build for fedora 18
INSTALL: add additional dependencies

These dependencies are required to build on Ubuntu.
add netctl for archlinux

netcfg is moved to the aur, this adds netctl support, and also resolves
the use of systemd to if /sbin/init is symlinked to the symlink binary.