examples/rpl_udp: use defaulttransceiver
Clean up test_irq (fix #943)
Make: do not spam error messages on shallow clones

> `--always`: Show uniquely abbreviated commit object as fallback.
Make: exterminate 'clean' buildtarget

Closes #993.

We do not need to descend into the modules to know what to do on
`make clean BOARD=blub`. We can just invoke `rm -rf bin/blub`.

This PR only keeps the descending into the USEPKGs, since they might
want to delete cached/downloaded/extracted data.
wsn430-v1_4b: don't always link cc2420
Add the ability to send a message to the current thread's message queue
(without raising an error)
ccnl: LRU is the replacement strategy, rename variable to express this
native: optionally exit() after last thread has ended

Used when compiled with NATIVE_AUTO_EXIT defined.
Merge pull request #972 from kaspar030/native_exit_after_last_task_v2

Make native exit after last thread has ended
Merge pull request #1003 from mehlis/ccnl-lru

ccnl: LRU is the replacement strategy, rename variable to express this
ccnl: remove useless compare

This compare is useless for CCN lite in RIOT, because
a face has always an interface with index >= 0
Merge pull request #990 from Kijewski/allow-shallow-clone

Make: do not spam error messages on shallow clones
Merge pull request #970 from rousselk/send_msg_intra_thread

core: Add the ability to send a message to the current thread's message queue
Merge pull request #1008 from mehlis/ccnl-serve-remove-if

ccnl: remove useless compare
changed pthread_self() to return thread IDs > 0
Fix test_pnet

fixes #829
Merge pull request #999 from OlegHahm/wsn430-v1_4_wo_radio

wsn430-v1_4b: don't always link cc2420
Merge pull request #830 from authmillenon/fix_test_pnet

tests: Fix test_pnet
fix doxygen documentation for clist.h, config.h, tcb.h and cib.h
Merge pull request #955 from thomaseichinger/fix_doc

core: documentation: fix doxygen documentation in cib.h clist.h config.h tcb.h