Lt 21728c: Parse Prioritizer

[jtmaxwell3]

I changed FieldWorks so that it could guess occurrences based on the previous word. I also made InterlinViewDataCache be a guess cache instead of a decorator.

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This change is 

[jasonleenaylor]

Reviewed 6 of 6 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @jtmaxwell3)

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Src/LexText/Interlinear/InterlinVc.cs line 2539 at r1 (raw file):

			// recreate the guess services, so they will use the latest FDO data.
			GuessServices.ClearGuessData();
			// clear the Decorator cache for the guesses, so it won't have any stale data.

remove decorator from comment

Code quote:

Decorator 

[jasonleenaylor]

Src/LexText/Interlinear/InterlinViewDataCache.cs line 42 at r1 (raw file):

			{
				default:
					throw new ArgumentException("tag", tag.ToString());

I think something like the following would be a better:
throw new ArgumentException(string.format("Unhandled property: {tag}", nameOf(tag));

[jasonleenaylor]

Src/LexText/Interlinear/InterlinViewDataCache.cs line 53 at r1 (raw file):

			{
				default:
					throw new ArgumentException("tag", tag.ToString());

also adjust this exception.

[jasonleenaylor]

Src/LexText/Interlinear/InterlinViewDataCache.cs line 69 at r1 (raw file):

			{
				default:
					throw new ArgumentException("tag", tag.ToString());

and all the rest.

[jasonleenaylor]

Reviewed 1 of 2 files at r2, 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @jtmaxwell3)