[do not merge] search wrapper for almdrlib

[msayler]

Problem

almdrlib can be used to write a client to submit search queries and fetch the results, but this process involves several steps and boilerplate that most users won't care about.

Solution

Extract the logic from a sample client and build something that will enable simpler end-user code:

search = almdrlib.search.Search(session=session)

search.submit(account_id=args.account_id, query_string=args.query,
              timeframe=args.relative, start=args.start, end=args.end)

for result in search.fetch_all():
    pprint.pp(result)

TODO

• Look into similar interfaces to remote datastores: what's the right interface?
• Add support for search_stylist formatting, including "standard" CSV
• "open in console" URL generator for results and individual messages
• Convenience methods for decoding results
• Include sample client
• Come up with some better time handling (Epoch only? With helpers?)

Comments welcome.