Limit size of uip/tcpip stack when not using TCP at all.
[docs] Remove outdated example-packet-drv

This example code is superseded by better examples in, for instance,
cc2538 and cc2420.

Fixes issue #208
Merge pull request #250 from karlp/kill-bad-docs

[docs] Remove outdated example-packet-drv
Added *.testlog
Merge pull request #251 from sieben/gitignore

Added *.testlog
Merge pull request #214 from lebrush/tcp-uip-size

Limit partially size of uip/tcpip stack when not using TCP at all