move resource from api to top-level
move drop and create_index to blaze/resource
import dispatch from blaze.dispatch, not multipledispatch
uri dispatched drop/create_index functions
use strtypes in resource.py
replace basestring with strtypes
Merge branch 'master' of github.com:ContinuumIO/blaze into drop-create-index-uri

Conflicts:
	blaze/__init__.py
Merge branch 'master' of github.com:ContinuumIO/blaze into drop-create-index-uri
expand ambiguities test
resource uses basestring rather than strtypes
explicit compute_* imports
Merge pull request #735 from mrocklin/drop-create-index-uri

Drop create index uri