Work on multidict
Document http exceptions
more work on multidict
added getall to views
updated multidict tests
Fix error message
updated code according to fafhrd91's comments
Fix error message

Conflicts:
	aiohttp/multidict.py
Merge branch 'multidict' of https://github.com/mind1master/aiohttp into mind1master-multidict
Fix stable ordering for multidict iterations, add more tests
Merge branch 'mind1master-multidict'

Conflicts:
	aiohttp/multidict.py
More tests for aiohttp.server
More tests
More tests
Fix doc typos
Add failing test
Change error text for connection closed by server between sending response
Drop closed connection from connector
Close connection if server configured without keepalive timeout
Switch to Apache license