Shoes::DIR is 'lib', but should be 'lib/..', like Shoes 3

[wasnotrice]

The main reason for this constant is so we can get assets packaged with Shoes. It works better like this:

"#{Shoes::DIR}/static"

instead of

"#{Shoes::DIR}/../static"

This change will also allow Shoes 3 scripts to run simply by changing DIR to Shoes::DIR. See samples/simple-bounce.rb for a (currently broken) example.

[wasnotrice]

(See #105 for original discussion)