MIf Filter: extract numbered paragraphs for translation

[Denis Konovalyenko]

Consider the following case.

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Every paragraph is prepended with formatted strings (aka “Prepending autonumber:”, “->” or “1.>”) which are not available for translation. It would be wise to extract only those which are in use (referenced without overriding) though.

For more details please refer to the attached documents.

[Denis Konovalyenko]

A related pull request #374 was opened.

[Denis Konovalyenko]

A pull request #21 was opened in Okapi Integration Tests.

[Denis Konovalyenko]

All aforementioned pull requests have been merged.