I finally got some time to upgrade to the 2.1 branch, via the zip archive. The CFastLED class functions (i.e. delay, setCorrection, etc.) throw a compile error.
error: ‘class CFastLED’ has no member named ‘delay’
Likely ended the class declaration too early with an extraneous closing curly brace? Looking into it…
No… that’s not it…
Is it possible that I have an old version of the library cached somehow? Is there a way to do a make clean? lol.
False alarm! That was just me sucking… 
I had the same problem and it was because it was still looking at the old library. I deleted everything fastled related in my library and imported it again. No issues after that.
Yep! That was my issue as well. Thanks @Royce_H