Be able to use any endpoint as a subcommand

[jeremyheiler]

Any endpoint in paprika.core should be executable as a subcommand.

lein paprika create-post :text "This is this post's text."

All the parameters will be bundled into a map and passed into the function. The token will be extracted from the map if it is provided by the command (ditto with client id and secret), otherwise it will be obtained by the usual methods.