Add module for finding libdrm
Add libdrm to build dependencies in CMakeLists.txt
Set drm flags and libraries for build
Add missing flags, inclusions and paths for libev

I forgot to add them in a previous PR extending the build env.
Fix: Function name "ws_object_get_id" -> "ws_object_get_type_id"
Merge pull request #49 from matthiasbeyer/fix-function_name

Fix: Function name "ws_object_get_id" -> "ws_object_get_type_id"
Merge pull request #42 from neithernut/add-build_env-libdrm

Add build env libdrm
Added simple main loop with signal handlers
Merge pull request #48 from TheNeikos/add-basic_main_loop

Added simple main loop with signal handlers
Structure the main function
Merge pull request #54 from neithernut/add-main-function_structure

Structure the main function
Add util/cleaner.{c,h}
Add interface for cleaner
Add cleaner implementation
Add cleaner to CMakeLists.txt
Remove cleanup helper in favour of direct cleaning in ws_cleaner_run()
Add cleaner calls in main()
Merge pull request #59 from matthiasbeyer/add-cleanup_util

Add cleaner utility
Add interface definition for logger module
Add logger/module.c to CMakeLists.txt