Milestone 3.0b

Next version of firmware and node database (nodewatcher).

Main goals:

• better support for multiple projects and admins (privileges, admin interface)
• decouple/abstract image building (so that it is easy to use OpenWrt, Ubiquity or even some other custom firmware)
• move node database (nodewatcher) features to extendable plugin system and use ​common schema also internally
• support for UMTS and PPPoE uplink
• support for AP and client mode (for point-to-point links)
• support for AP nodes without OLSR
• support for different versions of the firmware at the same time (stable/unstable)
• use tunneldigger instead of (or in preference to) OpenVPN (which is CPU bound on many current nodes)