Fix Rakefile for build failed problem in OSX
Merge pull request #6 from rnakano/test-fix-osx

Build failed in OSX (DLLIB file extension is .bundle)
fix: client->body set input values

fix write_body2mem -
* rb_strconcat never works for void* client->body...

set StringIO object to client->body when BODY_TYPE_BUFFER

prepare_call_rack -
set input values (client->body) when BODY_TYPE_BUFFER
refactoring
fix: relative path from rack handler
update .gitignore
add example: simple blog