Add a paragraph to the README.
-rw-r--r-- 4 .gitignore
-rw-r--r-- 696 README
-rw-r--r-- 736 Rakefile
drwxr-xr-x - bin
drwxr-xr-x - doc
drwxr-xr-x - ext
drwxr-xr-x - lib
-rw-r--r-- 704 rasterday.gemspec