Henry-E

For now it seems like I'm the only person who wants this and right now it will mess a little bit with how `close_accounts` works, so just going to ditch...

- looks ok - just adds additional command line arguments/ options for the geyser plug in Should be fine to merge

We now have the canonical closing pattern in anchor thanks to `realloc` and @Arrowana

Unfortunately I don't know enough about the wallet adapter interface to say if this is a safe / sensible change to make. Maybe someone else will come along that does...

Would it be possible to add a high level overview of what this PR is about? Curious to understand it better

Added an anchor test directory that initializes a market and shuts it down again, then checks that the sol is retrieved. It's not ready for merging yet though. There needs...

Ok, added the disabled flag. Going to start adding more comprehensive testing. It looks like the permissioned markets set of tests are failing because they're not using solana 1.9.0

@armaniferrante Ran a full set of tests on the new close market functionality. close_markets doesn't allow markets to be closed while - orders are in the bid or ask queue...

Travis CI tests added. Arguably we still haven't come to a good conclusion on the use of `disabled`. Serum was already design such that markets could be `disabled` by some...

this would have to be a UI thing