uIP ND6: added option to automatically fill the neighbor cache assuming autoconfigured IPv6 addresses

this PR to update uip-ds.h comments, this small change is made to ease the track of Tables implementation places

remove definition of UIP_CONF_DS6_ROUTE_NBU

retire 2 old macros DS6_NBR_NBU, DS6_ROUTE_NBU

Update uip-ds6.h

Update contiki-conf.h

Update contiki-conf.h

Update contiki-conf.h

fix doxygen comment

Update uip-ds6.h

This commit fixes nearly all of the reported doxygen warnings.

I tried to not clutter the log with removed trailing spaces.
Removed whitespace and converted tab/spaces for all files affected by this commit
are in a separate branch.

* Make these blocks appear in the respective module pages
* Re-word \file blocks to bring them up to speed with what each file actually does nowadays

A massive all-tree automated update of all double inclusion guard #defines that changes from using two underscores as a prefix, which are reserved, to not using two underscores as a prefix

Moved ETX management from neighbor-info to rpl-of-etx. Avoids conversions between different fixed point representations, and simplifies neighbor management. Makes more clear how default-ETX and noack-ETX actually affect the rank. Removed neighbor-info and neighbor-attr.

Make DS6 neighbors use neighbor-table, and move all DS6 neighbor management from uip-ds6 to a new uip-ds6-neighbor module.

Rewrote the uIP IPv6 route handling code. Instead of being nested deeply inside the uip-ds6.c file, the route management code is now in a separate file, uip-ds6-route.c. This file presents a lib/list.h API for the routes, which makes the route list much easier to use. Additionally, the uip-ds6-route.c file adds a callback API that invokes a callback when routes are added and removed.

Set no RPL as webserver6.minimal-net default and update README

Update the last lookup time for a neighbor when actually doing a lookup. Also fixed some coding style issues.

(Decrease packet numbers but dangerous if neighbors change their ips (not a problem in standard RPL with EUI-64 based addresses))

Allow to completely desactivate DAD (useless in route-over LLN as implemented, see http://tools.ietf.org/html/draft-ietf-6lowpan-nd-15#section-8.2)

When IPv6 ND kicks in, the packet that caused the ND can either be dropped or saved in a buffer to be send when the NS reply returns. This commit reimplements the buffer management to avoid having one buffer per neighbor, but instead use a buffer pool from which buffers can be allocated for different neighbors.

Clarified the function naming for neighbor information callbacks - names now indicate where the information is from.

factored out function for getting link local address in ds6 and made use of it in rpl for checking state of lladdress as DIOs should not be sent when tentative