Automatically remove dups in `$(USEMODULE)`
ccnl: remove useless config module
fixed Wformat warning
ccnl: extra debug statements
fixed Wformat warnings
Merge pull request #1091 from BytesGalore/fix_print_format_warning

test:test_pthread_barrier fixed Wformat warning
fix re-added removed printf formatter
Merge pull request #1096 from BytesGalore/fix_removed_formatter

test:test_pthread_barrier re-added removed printf formatter
Merge pull request #801 from Kijewski/makefile-no-usemodule-dups

Make: Automatically remove dups in `$(USEMODULE)`
sys: rename ringbuffer functions

Closes #1011.
shell: added RPL route shell command
Merge pull request #1092 from BytesGalore/fix_print_format_warnings_test_thread_msg

test:test_thread_msg fixed Wformat warnings
core: documentation: updated, improved, and completed doxygen comments
core: documentation: fixed bitarithm documentation
core: documentation: replaced task w/ thread
core: documentation: fixed typo in license header
documentation: extend description for CONST attribute
bitarithm: remove unused macros
documentation: fixed doxygen for schedstats
Merge pull request #1099 from Kijewski/issue-1011

sys: rename ringbuffer functions