Added create, remove and list commands for workspaces

[andreas-nesheim]

As referenced in Issue 130. Added a new CLI command for workspace. These commands include:

• create
• list
• remove

Hope you find this useful. I'd be willing to have a go at implementing commands for adding and removing signals to the workspace as well if this PR looks good.

[nblumhardt]

Thank you @andreas-nesheim - looks great.

We can definitely fill in the "modify" part; I was wondering, though, should we look at supporting this on create as:

seqcli workspace create -t 'test' --signal=signal-123 --signal=signal-124 --dashboard=dashboard-456

Keen to hear opinions :-)

[andreas-nesheim]

Sure, that sounds like a good idea! I'll try to implement it.

[andreas-nesheim]

I tried to add the options that we discussed now, but I see one of the tests in Appveyor is failing. When I try to run it locally it works, though.

[nblumhardt]

Thanks! I think the CI failure is a timing issue we haven't managed to flush out; it'd be unrelated to this PR. I've queued the build back up, everything looks good, we can tinker from here :-) 👍