Illustrator :: How To Create Swatch Library From Multiple PNG Files

Illustrator CC
 
I am having a difficult time trying to create a new swatch libray of patterns from multiple png files. The way I am doing this is very slow and repetitive and seems silly for a tool as advanced as the latest CC suite including illustrator.
 
What it seems I must do is open all the png files in Illustrator, creating multiple workspaces, drag one png file into the swatch window, then save that window as a library, close the existing window to reveal the next png file, open the user library I just created, drag the next image into the currently active swatch window, then drag the previous swatch/s from the user library into the current active swatch window, resave and replace the user defined swatch library (now with two images in there)fromthe updated current active swatch panel/window, close the existing workspace to reveal the next image file, and then repeat the process again, slowly building the user defined swatch library up by adding one image at a time and then adding back into the Swatch panel the previously built up library of swatches again one at at time.  (you can select all from the existing  user defined library and drag over into swatch panel, but this creates at least one  duplicate on each cycle for as soon as you click on the first swatch in the library, it adds itto the current swatch panel and then when you select all swatches to drag across it includes the first swatch and copies it again)
 
This is a very slow process to build up a swatch library. For some reason you cannot drag swatches directly into  the user defined library you have created, only into the active swatch window for each workspace. I searched the web and forums  for answers but could find none. There must be an easier way,  just can't find it.
 
Ideally, the best option would be a swatch window  option that allows the import directly from a list of selected files in the finder.