- Updated to docker-api 1.8.2
- Fixed remove_images option, wasn't previously cleaning intermediate
  images
- Enabled attach build output during Docker::Image.build
Extract parse_log_chunk into method
Fix parse_log_chunk() to handle chunks properly
Merge pull request #39 from adnichols/fix_remove_images

docker-api 1.8.2, fix remove_images, enable attach during build