switch from placeholder.it to holder.js for color blending images about less-docs

[Synchro]

I see holder.js is already in the javascripts.hbs include, so, depending on your environment, this should do the trick:
Search: \(http://placehold.it/(.*)/(.*)/(.*)&text=(.*)\)
Replace: (holder.js/\$1/#\$2:#\$3/text:\$4)
but you probably already know that...

[jonschlinkert]

thanks! I put this as a reminder to lookup the holder.js conventions and how they mapped over to placehold.it. I appreciate the ready-to-use regex!

[jonschlinkert]

btw, it must have taken you forever to setup those images. it's awesome that you did that

[Synchro]

As I recall I came up with the mechanism, but someone else actually did the docs following my suggestion. The key was that we needed a plain markdown-compatible solution, which holder.js isn't. Things have moved on so we are not constrained by that any more.

[Synchro]

The regex replacement I posted before was a bit wrong, so I corrected it, and I figured I may as well apply it now that I've got a local build working.