User class

[jsvoo]

Added user class, tests, and object modifying utilities. Some of the things I need feedback on include

• db selection: should this happen on instance of user class or is this constant. it's currently set to allow db settings on instance but defaulted to "mongo"
• standard id: id || _id ?
• Error handling: most errors have been handled on the dbDriver, I didnt think it was necessary to intercept responses or errors any further

[cubap]

The 'mongo' designation is probably going to be refactored in the future to something like "local" or "private" so it is appropriate to have in here.

[cubap]

Ids can be tricky.

_id is the mongoDB default and I think for all private data it is sufficient. id and @id are used in RERUM and always refer to a full URL for the JSON object. The end of the @id is the hexString from the _id in the MongoDB RERUM uses, but you can also use a slug to refer to an object and then the hexString is preempted by the __rerum.slug String.

[thehabes]

Noting that there are couple failing tests related to the /user endpoint when doing npm run allTests

[thehabes]

This has been merged into the reserveId branch, but we are leaving it open until we are sure everything is merged together correctly.