implementing draft-thubert-6man-flow-label-for-rpl-03
adding missing function to the simulator
little debug traces and code clean
fixing vs13 bug related to wrong macro name
FW-238. Fix for VS, per https://openwsn.atlassian.net/browse/FW-238?focusedCommentId=16514&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16514.
Merge remote-tracking branch 'openwsn/develop' into develop
Added the README.md file in the CC2538 board folder to indicate that we are using the CC2538 Foundation Firmware provided by Texas Instruments.
Merge pull request #76 from peretuset/develop

Added the README.md file in the CC2538 board folder
WDT_VECTOR. Fix?
Merge pull request #77 from openwsn-berkeley/develop_FW-246

FW-246. Fix?
FW-247. Fix.
Merge pull request #78 from openwsn-berkeley/develop_FW-247

FW-247. Fix.
FW-248. Fix.
Merge pull request #79 from openwsn-berkeley/develop_FW-248

FW-248. Fix.
FW-249. Dummy project for CC2538.
FW-249. Standalone IAR project for oos_openwsn.
FW-244. Fix.
FW-249. Fix.
Merge pull request #80 from openwsn-berkeley/develop_FW-249

FW-249. FW-244. FIx.
FW-250. Fix.