Volume access interface now supports numpy-like slicing syntax.
Initial commit: README
Added voxels_metadata.jsonschema
Added datasets_list.jsonschema
Added server_info.jsonschema
Added server_types.jsonschema
mockserver: support simple json queries: server/info, server/types, dataset/types
Added dvid_connection.py
Add 'dvidclient/dvidschemas/' from commit 'df7a2f8c97f66af76d411b7eca4d17fb77ad251c'

git-subtree-dir: dvidclient/dvidschemas
git-subtree-mainline: 0204006793d665df11d6ff60ffff47effb492b4f
git-subtree-split: df7a2f8c97f66af76d411b7eca4d17fb77ad251c
Added basic schema validation and tests for 'general' api calls
Merge branch 'schema-validation' into refactor
cleanups: imports
Fixed keyvalue commands, added keyvalue support to mockserver, added keyvalue test.