Need to fix errors to get on CRAN:

See 
https://cran.r-project.org/web/checks/check_results_colourlovers.html . 
Recent check runs are gettting 403 errors.

This looks like a permanent change, but there is also the CRAN policy

'Packages which use Internet resources should fail gracefully with an 
informative message if the resource is not available (and not give a 
check warning nor error).'

You need such protection in clpng, and for clpattern it would better be 
in  the function than in the examples.

Please correct ASAP and before Feb 18 to safely retain to CRAN.

Taking a stab at this now!

I'd love to help out!

@samprohaska If you want to take it over, send a PR that changes the maintainer field in DESCRIPTION and fixes whatever R CMD check errors there are. I can then add you as an editor and you can transfer the repo to your own account.