Better include path for YCM users

.ycm_extra_conf.py

@@ -16,14 +16,10 @@ flags = [
 # language that the files to be compiled are written in. This is mostly
 # relevant for c++ headers.
 # For a C project, you would set this to 'c' instead of 'c++'.
-'-x',
-'c++',
-'-I',
-'.',
-'-isystem',
-'/usr/include',
-'-isystem',
-'/usr/local/include',
+'-x', 'c++',
+'-I', 'include',
+'-isystem', '/usr/include',
+'-isystem', '/usr/local/include',
 ]