Ipwb

* Add ability to toggle memento display from main replay interface (496)
* Fix an issue where an error in the indexer, when piped to the replay, would cause an exception (489)
* Add display of replay help when no index passed or piped (478)
* Updated embedded Reconstructive to retain trailing slashes in URI-Rs (492)
* Fix an issue where specifying an outfile to the indexer without preceding path caused an error (498)
* Fix issue where URI-Ms linked from list created from search used an obsolete endpoint (500)

* Integrated testing and improved Docker build process (483)
* Fixed an issue, particularly evident in Docker, where an index file that is specified for replay was being ignored (426)

* Improve style of replay banner logo for non-square logos (465)
* Add ipwb logo to replay banner (477)
* Fix replay for single-memento search (476)
* Add more test cases for replay lookup (479)
* Remove redundant Travis invocation for pytest (480)
* Skip location rewriting for non-URL redirects (for 456)
* Add URL checking functionality with unit tests (461)

* Fixed an issue that allowed replay to start using a non-existent CDXJ (467)
* Increased severity and verboseness of using an inaccessible or non-existent CDXJ from IPFS

* Improve archival replay banner UX with more accessible inter-memento navigational control per 465.

* Vastly improve the usefulness and aesthetics of the replay banner to include human-readable dates and inter-memento navigation (449)