Modify array strings

Something I forgot to mention, we've modified the array support. The 1.2 format supports something called a "liststring" which is basically an array of strings and would be able to parse something like `foo|bar` where `|` is the separator. This wasn't very well done and @eduramiba improved the underlying array parsing and printing code so we can parse things like `[foo, bar]`, `foo,bar` or even `["foo", "bar"]`. We've also added new types: `listboolean`, `listinteger`, `listlong`, `listdouble`.