Link to JSON adapter corrected: boring_json.py -> basic_json.py

[againagainst]

Current link in the http://ripozo.readthedocs.io/en/latest/topics/adapters.html leads to a 404.
Probably caused by: 8668d5d

[coveralls]

Coverage remained the same at 100.0% when pulling f766de5 on againagainst:man_missing_link_hotfix into e648db2 on vertical-knowledge:master.

[coveralls]

Coverage remained the same at 100.0% when pulling f766de5 on againagainst:man_missing_link_hotfix into e648db2 on vertical-knowledge:master.

[coveralls]

Coverage remained the same at 100.0% when pulling f766de5 on againagainst:man_missing_link_hotfix into e648db2 on vertical-knowledge:master.

[coveralls]

Coverage remained the same at 100.0% when pulling f766de5 on againagainst:man_missing_link_hotfix into e648db2 on vertical-knowledge:master.

[coveralls]

Coverage remained the same at 100.0% when pulling f766de5 on againagainst:man_missing_link_hotfix into e648db2 on vertical-knowledge:master.

[coveralls]

Coverage remained the same at 100.0% when pulling f766de5 on againagainst:man_missing_link_hotfix into e648db2 on vertical-knowledge:master.