Tutorials (Pulse Scheduler): fix header levels (#1061)

Fix issue where "Scheduler Methods" would show up as a top-level header in the Pulse Tutorials on https://qiskit.org/documentation/tutorials/pulse/.

Merge pull request #924 from Cryoris/remove-pprint

Remove pprint_as_string from optimization

update readme

Merge pull request #844 from nonhermitian/last_014_fixes

header fixes

Add standard footers to Ignis and Aqua tutorials (#784)

* reduced devices

* rename to reduced backends

* remove from master

* add footers

* updates

Update readme.md (#553)

Merge pull request #476 from Qiskit/jaygambetta-patch-1

Update README.md