post interim speech results as textentry updates to PHP API

An ideal solution to concurrent text entries POSTs would be if the API supported specifying some identifier for the text entry (not necessarily textentryid) that we could refer to when updating.

If we can't add the above functionality to the API we will have to prevent posting updates until the initial post returns.

We should also only post updates when the transcript is different. You can get a LOT of interim results in a short period of time and this will KILL the developers' quotas. We should prevent unnecessary calls where possible.