Hypertables and Chunk support

[davydog187]

Add support for create and managing hypertables and chunks

• [x] create_hypertable
• [ ] show_chunks
• [ ] drop_chunks
• [ ] reorder_chunk
• [ ] move_chunk
• [ ] add_reorder_policy
• [ ] remove_reorder_policy
• [ ] attach_tablespace
• [ ] detach_tablespace
• [ ] detach_tablespaces
• [ ] show_tablespaces
• [ ] set_chunk_time_interval
• [ ] set_integer_now_func
• [ ] add_dimension
• [ ] create_index (transaction per chunk)
• [ ] hypertable_size
• [ ] hypertable_detailed_size
• [ ] hypertable_index_size
• [ ] chunks_detailed_size

[doomspork]

@davydog187 do you want to add these functions to the migration.ex file or start to break things up by grouping (ie chunks.ex) and import them?

[davydog187]

What if we added to migration, but then for the more diagnostic functions we add to a different module?

[davydog187]

I don't think we need most of these for the first release. Will split this out