site(customize.html): #1144 - Allow multiple endpoint selections

This fixes the customize.html form  to allow users to select more
than one endpoint handler.

I guess this fixes #1144
chore($scaling): start of 4.4 gh-pages, mention scaling

Also, remove any unnecessary Fine Uploader css or js files

[skip ci]
chore($site): upgrade to 4.4.0-7
[skip ci]
Merge branch 'site/multiple-endpoints' into site/4.4

* site/multiple-endpoints:
  site(customize.html): #1144 - Allow multiple endpoint selections
fix: #1144 - Error when selecting traditional
site: #384 - Allow total progress custom builds
site: #1061 - Allow image scaling in custom builds
refactor: Move image-related modules to be near each other
fix: Add .travis.yml to stop running CI on branches based off of gh-pages
feat: Disallow users from building when an endpoint has not been selected
chore($release): perpare for 4.4 release
[skip ci]
Merge branch 'site/4.4' into gh-pages