Add directory missed by silly .gitignore content.
-rw-r--r-- 67 .gitignore
-rw-r--r-- 208 CMakeLists.txt
-rw-r--r-- 5130 COPYING
-rw-r--r-- 162 Makefile
drwxr-xr-x - data
drwxr-xr-x - doc
drwxr-xr-x - libs
drwxr-xr-x - src
drwxr-xr-x - support