Pypuf

* 22b8040: docs: fixes broken table overview of pypuf data
* 017d039: meta: adds ORCIDs for Khalid and Adomas
* 0ed582e: meta: fixes Nils' ORCID

* c23ba88: adds simulation, attack, and metrics related to optical PUFs
* ed63388: meta: adds CITATION file for GitHub integration
* 9e609ac: io: adds data for Hybrid Boolean Network PUF (HBN-PUF) by Charlot et al. 2021
* 60de24c: io: save CRP sets compressed
* f50cd6f: docs: fixes formatting of data set doc
* c2f0d80: io: fixes response shape for data with 1 response bit and 1 repetition
* 2329101: docs: adjust citation for Aghaie and Moradi 2021

* 6caaaa0: docs: remove unnecessary extra layer in TOC
* 587fb04: io: indicate download in progress in log message
* 12a046e: io: Adds Interpose PUF data by Aghaie and Moradi (2021)

* ac8fa5a: io: introduce fetchable data sets
* 5a918b1: removes depricated PickleResultCollection and pandas requirement
* cf49c8e: io: removes unused code
* 3e10c5b: io: adds documentation
* 480a105: io: save and load CRP data to/from disk
* 1d896f7: Adds attack based on the LMN algorithm (PUFMeter)
* daa6eee: Adds metrics used by PUFMeter: (total) influence, noise sensitivity
* b91d644: docs: restructure section on metrics
* 27e0a71: README: adds hint on how to add projects to the list
* ae0cf1b: README: adds the LP-PUF project using pypuf
* 5b9b70a: README: adds link to eprint using pypuf
* 9dee98b: attack: fixes LR 2021 attack for k=1 (i.e., Arbiter PUFs)
* 56d1ea2: breaking: simulation: adjust weight dist. and bias of XOR Arbiter PUFs

* 4d5bac8: metrics: fixes 166 reliability metric
* 4346016: docs: relaxes doc tests on attacks

* e3fc181: docs: adds missing author to suggested citation
* 1a99b7d: docs: try to fix DOI badge on GitHub
* 252c275: simulation: fixes sim of Feed-Forward PUFs with 'crossed' loops
* 7fe6768: metrics: adds bias metric
* 783b6e0: attack: adds multilayer perceptron attack by Wisiol et al. 2021
* 5fc800a: ci: show exact versions used during ci run
* 8709fa3: attack: adds improved version of Rührmair et al. 2010 LR attack
* 84b43f0: attacks: introduces base class
* ae54386: simulation: additional test for FeedForwardArbiterPUF
* 194fe46: docs: update bibliography to peer-reviewed paper versions
* e10e5cf: ci: exclude Python 3.9 (tensorflow is not yet available)