$bdroot is a reference to the current mdl file.  It's used only in newer (>=2017)
matlab versions.

post process script changed to replace $bdroot with current file name, rather than truncated system name.
Also, a single typo was fixed.

RCG test: some improve tests.  Autotest added.

See merge request cds/advligorts!280

rcgtest: tests made more 'rcg directory' agnostic.  Some race conditions that could fail tests improved.

RCG: Clear up all warning on slow control models

Closes #318

See merge request cds/advligorts!278

Tweaking types to make sizes correct for epics

See merge request erik.vonreis/advligorts!2

RCG: Remove html tags from all annotations

See merge request cds/advligorts!279

Except <br/> tags are replaced with newlines.

RCG: fix out of order calculations, add order check

Closes #325

See merge request cds/advligorts!276

rcg: Moved sequence check into /src/python dir.  Improved sequence error message.  Fixed some typos and formatting issues.

test is implemented as a python script in test/python_modules/sequence/

test compares the calculation sequence to the calculation graph.

The test is run during compilation after parsing but before building.  By default, a failure will kill compilation, but
if IGNORE_SEQUENCE_ERRORS=1 in the environment, only a warning will be issued and compilation will continue.

Two out-of-order bugs are fixed.

1. Ordering simply counts how many inputs of a part of visited. When that number matches the total inputs for the part, the part is visited,
but inside a subystem, delays were counted twice.  Once on the initial pass looking for signal sources, and again as a normal part.

Parts that took input directly from delays could appear early in the sequence.

This change skips following links form delays as a normal part.

2. If a data source, including subsystem inputs, constants, delays, grounds were connected directly to a subsystem output, then
parts immediately connected from the output would be added to the subsystem sequence, though they were at a higher level.

This bug could cause these parts to be sequenced out of order.

Change is to check whether a part leading form a data source is in the subsystem.  This check is already included when following from normal (non-input) parts.