typo in event resource handler comment

at line 531 says PERIODIC_RESOURCE, shouldn't it be EVENT_RESOURCE, since it's a EVENT_RESOURCE demo?
native: Add CTK to the module list

It is needed for apps compiled WITH_GUI.
Merge pull request #603 from mmuman/native-platform-ctk-module

native: Add CTK to the module list
Merge pull request #575 from lecneri/patch-1

typo in event resource handler comment
Removed unused variable.
Merge pull request #607 from oliverschmidt/master

Removed unused variable.
CONTIKI_PROJECT are sometimes set to multiple files.