ccnl: don't include c files

this fixes a build problem on
debian and ubuntu based systems
Merge pull request #1051 from mehlis/debian-build-fail

ccnl: don't include c files
ccnl: appserver: remove unused flag
Merge pull request #1054 from mehlis/ccnl-unsued-var-appserver

ccnl: appserver: remove unused flag
Splitting rpl_structs.h into structs and config part
ETX-functionality is now part of a common routing-module
Merge pull request #918 from fabianbrandt/etx_now_routing

ETX-functionality is now part of a common routing-module
Four macros changed to static inline type functions and style fixes
Merge pull request #917 from fabianbrandt/rpl_config_split

Splitting rpl_structs.h into structs and config part