add note about performance when using new Promise(resolver)

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fix link
runtime API misuse rejects instead of throwing

add assert fails
wrap thrown/errbacked primitives in promisify
use current 'this' in individually promisified functions if no explicit receiver is given
Promisify prototype chains too
make the hidden prop noneumerable
add subclassing tips
Release v0.7.12-0
Remove eager generator detection to allow shims to be used
Release v0.7.12-1
Merge branch 'master' into gh-pages
bundle