network-manager-dev binary package in Ubuntu RTM 14.09 i386

 NetworkManager attempts to keep an active network connection available at all
 times. It is intended only for the desktop use-case, and is not intended for
 usage on servers. The point of NetworkManager is to make networking
 configuration and setup as painless and automatic as possible. If using DHCP,
 NetworkManager is _intended_ to replace default routes, obtain IP addresses
 from a DHCP server, and change nameservers whenever it sees fit.
 .
 This package provides header files that are needed to
 compile VPN Plugins for NetworkManager.

Source package