produce sprite with less blurring due to down sampling 

When down sampling the Gemoji png's use a custom defined blur filter to reduce blurring artifacts.

(these settings produced the best results in my testing, improvements can likely be made)
updated graphic using blur filter settings
mac line endings converted
fixed error with missing quotes on array index name
added a check to ensure $maps[$dest]['unicode'] exists before we test to see if it's an array
error checking added in build scripts
included missing php tags
updated optimize to use pngout (pngout-static is no more)
updated build_image to default to vertical sprite mode (better size/compression, over 100k reduction in sprite file size)
updated build_image to support --grid & -g for users that wish to stick to the grid layout
updated css to use new vertical sprite
emoji.png has been optimized via pngout