Remove the 8192px limit on save for web in Photoshop CC

Reference to https://github.com/untallucas/photoshop-slices-exporter

untallucas's script don't work in Photoshop CC.

Photoshop has a limit of 8192 pixels when save for web.

Use the script to replace the function.

Usage:

• Try to use "save for web" function to set the output setting is "HTML and Images", not "Only Images" or "Only HTML".
• Open "File - Scripts - Browse... - Select [slicer.jsx]".
• Input the name of output file.
• Select the folder of output file.
• Alert "Export success!", completed.