Saving name and description about a popit api instance

[lfalvarez]

This PR adds a method to all the PopitApiInstances out there so they can get information about what their name is and description, this PR will also store that information.

Unfortunately, the url cannot yet be determined correctly so you might be tempted to not accept this PR until we have that sorted out, the explanation for that problem can be found in get_about().

This also provides vcrpy to the tests which could probably help to solve #600.

This does not get the about your popit information when loading from popit.

So probably in order to finish #846 we would need to:

• get the about your popit info when pulling from popit.
• display the name and description in the Source Manager.

Please don't merge just yet I think it still needs some work.

[landscape-bot]

Repository health decreased by 0.03% when pulling 2b09ff9 on issues/846/chicken-way into 3390598 on master.

• 3 new problems were found (including 0 errors and 3 code smells).
• No problems were fixed.

[coveralls]

Coverage increased (+0.01%) to 98.6% when pulling 2b09ff9 on issues/846/chicken-way into 3390598 on master.

[landscape-bot]

Repository health decreased by 0.03% when pulling 6f19ddc on issues/846/chicken-way into baf97a3 on master.

• 3 new problems were found (including 0 errors and 3 code smells).
• No problems were fixed.

[coveralls]

Coverage increased (+0.01%) to 98.63% when pulling 6f19ddc on issues/846/chicken-way into baf97a3 on master.

[coveralls]

Coverage increased (+0.01%) to 98.63% when pulling 6f19ddc on issues/846/chicken-way into baf97a3 on master.

[landscape-bot]

Repository health increased by 0.04% when pulling 2b11068 on issues/846/chicken-way into 154d8a9 on 1033-email-links-addresses.

• 3 new problems were found (including 0 errors and 3 code smells).
• No problems were fixed.

[coveralls]

Changes Unknown when pulling 2b11068 on issues/846/chicken-way into * on master*.

[coveralls]

Changes Unknown when pulling 2b11068 on issues/846/chicken-way into * on master*.

[landscape-bot]

Repository health increased by 0.01% when pulling 3d97456 on issues/846/chicken-way into 154d8a9 on 1033-email-links-addresses.

• 3 new problems were found (including 0 errors and 3 code smells).
• No problems were fixed.

[coveralls]

Changes Unknown when pulling 3d97456 on issues/846/chicken-way into * on master*.

[coveralls]

Changes Unknown when pulling 3d97456 on issues/846/chicken-way into * on master*.