Homestyx hydra

R1:f010730e49b0

Migrate all Differential inline comments to ApplicationTransactions

Summary:
Ref T2222. This implements step (1) described there, which is moving over all the inline comments.

The old and new tables are simliar. The only real trick here is that `transactionPHID` and `legacyCommentID` mean roughly the same thing (`null` if the inline is a draft, non-null if it has been submitted) but we don't have real `transactionPHID`s yet. We just make some up -- we'll backfill them later.

Two risks here:

- I need…
Repository: R1 hydra
Commit Date: Oct 19 2013