R1:10486691581e

Provide a paste.create Conduit method

Summary:
- Allow the console to handle abstract classes correctly.
- Move paste dictionary generation to an abstract base class.
- Add paste.create.
- Add 'objectName', 'parentPHID', and 'content' to Paste info dictionaries
(you can use filePHID with file.download to get the content but I think just
always sending it back is reasonable).

Test Plan:
- Use paste.create to create new pastes.
- Used paste.info to get existing pastes.
- Checked console UI to…