Update 01 Physical Goods.md

Link to Ricardian Contracts info
Update 01 Physical Goods.md

Fix links to Peer-to-Peer Lending on OpenBazaar
Fix comments and unit test for market.py and style and docs

Fix comments and unit test for market.py and style
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[FEATURE] Fix logging-not-lazy and the whole set of comments to market.py and 2 links in docs

[FEATURE] Fix comments and quotes in a log

[FEATURE] Fix comments and unit test and style for market.py

[FEATURE] Fix comments and unit test for market.py

[FEATURE] Fix comments and unit test for market.py and style

[FEATURE] Fix comments, used imperative form for docstrings

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= squash =
[FEATURE] Fix comments and unittest for market.py and style and docs lincs

[FEATURE] Fix comments and unittest for market.py and style and docs lincs

Update market.py

Fix some comment

[FEATURE] Fix comments, used imperative form for docstrings

Fix comments, used imperative form for docstrings

Fix comments, used ran, etc

Test market, etc

Test market, etc

Update 01 Physical Goods.md

Fix links

Update 01 Physical Goods.md

Add master
test_market.py, test/myprog.py etc
Fix grammar, Obvious comment
Fix details comment
Merge pull request #658 from Ignat99/feature

Fix comments and unittest for market.py and style
Module maintentace

* Fix docstrings now that contact.py is gone.
* Slightly improve code style. Delegate to __eq__
* Simplify exception handling in removeContact. The docstring should be
  enough documentation for anyone reaching this code via a traceback.
* Drop comment mentioning IndexError.
* Store market_id value for future reference.
* Add note about peculiar behavior of getContacts.
Improve code coverage of unit tests.

* Test getContacts on empty bucket.
* Test market_id attribute.
* Factor kbucket creation.
* Abstract testing of getContacts.