Implement warning if prepare is present with api_version 2 property for algorithm

See merge request !22

Prepare algorithm on execution

See merge request !21

This a new step for API V2

[executor] Send done to db if connected

See merge request !20

Disable Python 2

Closes #18

See merge request !19

The test prefix of this package is also used in other tests like
those of beat.core. Modifying such a base element can have far
reaching consequences.

Merge development branch 1.5.x

Closes #16

See merge request !17

Fix output to named tuple member retrieval

See merge request !16

This allows to properly initialise and use database views that
uses python keywords as output name.

Fixes #16

Documentation for making a new database views in beat

See merge request !15

Added documentation anchor

See merge request !14

Improve documentation

See merge request !13

Also cleaned up unused import

And fixed unused imports

Also fixed import warnings

Also fixed import warnings

Also fixed import warnings

Also fixed import warnings