+0 a few minor licensing/header issues and may not pass an incubator vote.
If this come up to vote on the incubator list I’d probably vote +1 and ask that
they be fixed in the next release but others may vote differently.
- has incubating in name
- signature and hashes correct
- NOTICE not updated for 2016
- LICENSE is missing sizzle.js bundled inside , glyph icons license  see
bottom of  for details, and normalise.css 
- No unexpected binary files
- ASF files have ASF header
- Can compile from source
Another minor issue:
- Two files have a copyright year in the ASF header 
This fictional example I created may help  as it also bundles bootstrap.