Improve docs errors

[Ed McDonagh]

Mostly code documentation issues, some redundant files etc

[Ed McDonagh]

Updating Celery settings to lower case; previous will be deprecated in Celery 6.0. Refs #857 because need to upgrade Celery to avoid Sphinx warnings.

→ <<cset bd747f3cfce5>>

[Ed McDonagh]

Peg Celery to latest current version of 4. Made tasks imports relative. Fixed or removed autodoc imports. Refs #857

→ <<cset 72d0756ebbd2>>

[Ed McDonagh]

Removed some obsolete docs. Removed some duplicate references. Disabled some refs that no longer exist. Much more to do. Refs #857

→ <<cset 483ae982203f>>

[Ed McDonagh]

Moving the celery import in the docs conf in the hope it might make it work! Refs #857 [skip ci] docs only

→ <<cset 85a2949b2070>>

[Ed McDonagh]

Failing because it can't load PyFunction. Adding pyfunction to requirements, doesn't look like the right mdoule though...! Refs #857 [skip ci] docs only

→ <<cset 404c6723348a>>

[Ed McDonagh]

Appears RTD is using really old sphinx. Trying current version. Refs #857 [skip ci] docs only

→ <<cset 21694e05e6de>>

[Ed McDonagh]

That worked. Adding current versions of the other sphinx modules. Refs #857 [skip ci] docs only

→ <<cset c7ed19d065a9>>

[Ed McDonagh]

Correcting RTD spelling. Refs #857 [skip ci] docs only

→ <<cset 4130425c1d94>>

[Ed McDonagh]

Generated a fresh quickstart conf.py. Refs #857 [skip ci] docs only

→ <<cset 295734a98ce2>>

[Ed McDonagh]

Import errors in building docs. Refs #857 [skip ci] docs only

→ <<cset cc498b87f714>>

[Ed McDonagh]

Replacing the old version that didn't have openrem on the path... Refs #857 [skip ci] docs only

→ <<cset 62696377ee4c>>

[Ed McDonagh]

OpenREM back on path, import Django settings first. Refs #857 [skip ci] docs only

→ <<cset 5a3f5aed3d06>>

[Ed McDonagh]

See if it really was an empty SECRET_KEY. Refs #857 [skip ci] docs only

→ <<cset 9cc9f3b3c80a>>

[Ed McDonagh]

Setting location for logs when on RTD. Refs #857 [skip ci] docs only

→ <<cset e93a502ec62a>>

[Ed McDonagh]

Needs to get to remapp, adding to path. Refs #857 [skip ci] docs only

→ <<cset a99337f5b9fe>>

[Ed McDonagh]

Removing Alabaster theme! Refs #857 [skip ci] docs only

→ <<cset a8780432e9a1>>

[Ed McDonagh]

Updating flower to current, minor error on linux install docs. Refs #857

→ <<cset c0de8e4fddb2>>

[Ed McDonagh]

Merged in issue857docserrors (pull request #397)

Refs #857 more to do though...

→ <<cset b54e6e4870a0>>

[Ed McDonagh]

Fixing some of the RTD compile errors - plenty more to do. Refs #857 [skip ci] docs only

→ <<cset 2fbab0aed365>>

[Ed McDonagh]

Removed Celery docs. Added ref to linux version of post 0.10.0 upgrade, but will need revising. Refs #857 [skip ci] docs only

→ <<cset 385fc1c060bc>>

[Ed McDonagh]

Removing DBT laterality fix instructions, no longer valid. Refs #857, #411, #549 [skip ci] docs only

→ <<cset 22ebb8fc2908>>

[Ed McDonagh]

Updating more references. Refs #857 [skip ci] docs only

→ <<cset a1e347930e5b>>

[Ed McDonagh]

All errors now relate to old release notes and upgrade_previous_0.10.0. ? remove all upgrade instructions from release notes? Refs #857 [skip ci] docs only

→ <<cset 78bd9afae281>>

[Ed McDonagh]

Removing all specific upgrade docs up to 0.7.4, referring them all to 0.10 docs. Refs #857 [skip ci] docs only

→ <<cset 74f2c6f45be6>>

[Ed McDonagh]

Adding feature summary and links back into 0.6.0 docs. Refs #857 [skip ci] docs only

→ <<cset 3bae1af55dba>>

[Ed McDonagh]

Removing upgrade instructions from 0.8 series. Refs #857 [skip ci] docs only

→ <<cset f478b85068fa>>

[Ed McDonagh]

Removing upgrade instructions from latest release notes - need to link to new install/upgrade docs. Refs #857 [skip ci] docs only

→ <<cset ee56d98b3d64>>

[Ed McDonagh]

Merged in issue857docserrors (pull request #530)

Refs #857 but does not complete it

→ <<cset 91946f93ab48>>

[Ed McDonagh]

Fixed with pull request #537 <<cset bde2b30a2753>> and pull request #530 <<cset 91946f93ab48>>