Async HTTP client using curl
100% coverage for kombu.async.http.base
Some improvements
Initial import of kombu.async.aws

Tests: Use setup/teardown instead of setUp/tearDown

Tests

async.http: Auth support

Tests for kombu.async.aws.connection

All tests for SQS and implemented message batch operations

SQS: Removes poor fanout support using SDB

Async SQS working somewhat

More fixes

flakes

SQS: Improves async queue/channel scheduling

Adds Transport.implements for introspection of transport capabilities
Lazy import of boto library
Make sure tests run without boto and pycurl
curl tests start
Merge branch 'master' into curlclient

Conflicts:
	kombu/async/hub.py
	kombu/tests/case.py
	kombu/tests/transport/test_redis.py
	kombu/transport/SQS.py