Get Paste now works; added message to Get Paste when trying to load a private paste.
Login, logout, and delete paste now work.
List Recent Pastes now works.
Get User's Info now uses new API wrapper.
Removed command line arguments. Fixes #23.
Options can now be saved. Fixes #17.
List User's Pastes and List Trending Pastes now use new api. Fixes #16, fixes #18.