Exporting RCG_BUILDD so feCodeGen has an absolute path for code generation

See merge request !15

Fixes a problem with systems being defined with different subsystems in different database files, losing some entries that were only in one file.

Allow environment to override systemd_env files in rtcds

Closes #25

See merge request !14

Add simple-output option to build

Closes #23

See merge request !13

Add non-zero return codes on error

Closes #24

See merge request !12

Set timeout for epics process shutdown to 5 seconds

Closes #27

See merge request !11

fe_generator: EDCs now delayed at startup

See merge request !10

So that users can change RCG_SRC or similar.

Just prints a single line when a model is finished building and direcct-output is turned off.
Useful for automated scripts

Also, add some checks for some unexpected names in revert command.

Make revert command continue on failed reverts.

Closes #27.

Some processes were timing out during shutdown if they tried to read an epics variable form the network, starting caRepeater.

Revert model functionality

See merge request !9

Revert model functionality

See merge request !9

Install option on build, improve --version option

Closes #22

See merge request !8

New structure for startup generator

See merge request !7

Added sisci module to dolphin driver (!)
Now boots on large test stand.

Addresses a number of issues

See merge request !6