 - Fixed a bug (alpha channel wasn't outputted correctly)  - Removed redundant pass over difference data  - Optimized a bit more (I'm done with that for now)
 - Fixed a bug (alpha channel wasn't outputted correctly)
 - Removed redundant pass over difference data
 - Optimized a bit more (I'm done with that for now)

shanemarks/signed-distance-field-font-generator,teburt/signed-distance-field-font-generator,blast007/signed-distance-field-font-generator,shao-kai/signed-distance-field-font-generator,develophant/signed-distance-field-font-generator,pailhead/signed-distance-field-font-generator,kl-ing-one/signed-distance-field-font-generator,czaloj/signed-distance-field-font-generator,Searge-DP/signed-distance-field-font-generator,chenjt/signed-distance-field-font-generator,sssa2000/signed-distance-field-font-generator,Dynad/signed-distance-field-font-generator,theor/signed-distance-field-font-generator