Fix resend in case of partial data.

See merge request asapo/asapo!207

Add API to return list of datasources for given beamtime.

See merge request asapo/asapo!206

Reduce memory footprint from asapo monitoring

See merge request asapo/asapo!205

Expose parameters of the retention policy to config file. Use sum of the data points instead average. Fix inset in the fields name of the InfluxDB response. Split request to the InfluxDB to two periods: full data and grouped data. Add results of response via concatenation of vectors.

get_next_available

See merge request asapo/asapo!204

Allow sending objects supporting the buffer interface

Closes #7

See merge request asapo/asapo!187

Add optional argument `ordered` to consumer function get_next. If true messages will be ordered by message_id otherwise by _id.

Add boolean parameter `ordered` to request get_next. If True, it returns next by message_id, if not by _id.

Speedup get_next

See merge request asapo/asapo!203

This includes read-only buffers.

The code split between bytes and numpy array is removed and all objects
are now handled equally.

Furthermore, it seems to be more correct to increase the ref count for
None objects as well, while a pointer to that object is used.