ccnl: use a second helper thread to handle e.g. timeouts
ccnl: use vtimer instead of rtc
ccnl: make theRelay use dynamic memory
ccnl: make relay start on RIOT startup
ccnl: use stacksize main for all threads
ccnl: prevent race condition on teardown
ccnl: adapt HOWTO to new features
ccnl: change timeouts to useful values
ccnl: normalize time before using it
ccnl: fix function name
ccnl: finish rebase
examples: changed stacksize to the recommended value
Merge pull request #1320 from mehlis/ccnl-timeouts

ccnl: change timeouts to useful values
Merge pull request #1026 from mehlis/ccnl-helper-thread

ccnl: refactor ccn lite stack
Merge pull request #1450 from mehlis/ccp-stacksize-fix

examples: changed stacksize to the recommended value
doc: mainpage.txt fixed minor mistake
Merge pull request #1453 from backenklee/dpr

doc: mainpage.txt fixed minor mistake
Refactored and splitted crypto module into several modules

The structured directoy layout is the following:

* ciphers are now located in sys/crypto/chipers/*
* hashes are now located in sys/crypto/hashes/*

Each cipher (AES, 3DES, RC5, SKIPJACK, TWOFISH) / hash (sha256)
can be used with USEMODULE-Macro.
Apply coding styles to crypto ciphers and hashes
Added NULL cipher for crypto operations