* Adress concerns from python-dev. * Add myself to authors.
* Grammatical changes to PEP 546 * Address @alex's grammatical feedback.
* New PEP 546: Backport MemoryBIO to Python 2.7 * PEP 546: Alex Gaynor's review * PEP 546: Nick Coghlan's review: ensurepip * PEP 546: new Nick Coghlan's review