Added grid

Rearranged sprites and added grid markers for reference

Signed-off-by: Laura Bailey <lbailey@redhat.com>
Adding testable sprite sheet

Minor updates to PSD assets and added testable sprite sheet to images/entities

Signed-off-by: Laura Bailey <lbailey@redhat.com>
Merge branch 'master' of https://github.com/davidmason/blob-golem