Make log.dump take multiple arguments.

Unfortunately it is no longer possible to set the log level. But it
makes it a whole lot easier to dump a bunch of things at once, so I
think it's worth it.
Copy styleRef on line creation.
Heavily modify Tags.

Add format methods to convert values into nicely formatted tags.

Remove unnecessary fields type and output, except for alpha and color,
which need a type field.

rename `convertValue` field to just `convert`.
Finish writing transform interpolate function.
Various fixes in Transform.
Change initialState to priorState in Transform

More precise terminology.
Add dialogue checkbox for interpolating transforms

hat speec
Add interpolateTransforms to Line class.
Fix usage of convertTagValue
Add a check for styles.

Probably a better solution is just to create a default style in the
script and maybe I will do that in the future, but you have to try
really hard to actually get this error to occur.
Copy our options over to resultingCollection.
at this point i am just wildly inflating my commit count.
turn the transform detokenization into a great big mess.
Hook up transform interpolation.
Make reading prior tags actually work.
Fix absPos and update its description.
Add support for clip/iclip defaults.
As far as I know we don't use re any more.