Refactor DLA

[BobLd]

Make DlaOptions an interface, add IWordExtractorOptions, remove GetBlocks(words, options), GetWords(letters, options) and put options in constructors - Fix #424. Tidy up code

OPen for discussion and feedback/ideas. Introduces breaking changes

[EliotJones]

Looks good to me, sorry for the long delay but would you be able to add a quick text summary of any compatibility changes for release notes for the next version. As I understand it it's something like:

someClass.Instance.GetWords(input, options);

Becomes:

new someClass(options).GetWords(input);

[BobLd]

@EliotJones Please find below what I would add in the notes. Also, I will update the wiki once the new version is there.

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They are breaking changes in the latest version's document layout analysis tools. The options are now passed in the constructor.

IPageSegmenter

var blocks = DocstrumBoundingBoxes.Instance.GetBlocks(words, options);

or

var pageSegmenter = new DocstrumBoundingBoxes();
var blocks = pageSegmenter.GetBlocks(words, options);

becomes

var pageSegmenter = new DocstrumBoundingBoxes(options);
var blocks = pageSegmenter.GetBlocks(words);

The same applies for RecursiveXYCut and DocstrumBoundingBoxes

IWordExtractor

new NearestNeighbourWordExtractor().GetWords(letters, options)

becomes

new NearestNeighbourWordExtractor(options).GetWords(letters)