Use normal binding for SimpleObserver.
tree746dd14221cb62c209371beafae09696e11f3e2d
-rw-r--r-- 12 .gitignore
-rw-r--r-- 125 Rakefile
drwxr-xr-x - data
-rwxr-xr-x 53 kaya
drwxr-xr-x - lib
drwxr-xr-x - test