Adds httprequest for showdbs

(#5)
updates .gitignore
Adds `dbs` command to the reply

`dbs` will show which subreddits the user is marked as an approved
contributor, this will only matter for private subreddits (which we
assume the user should be using as a db)
adds changeCollectiondb(collection)

this allows changing of collection or in reddit terms the post
Updates documentation
Fixes function naming
Merge pull request #6 from frankcash/master

Creates way to change DB and Collection