Break down IndexByDate.txt files by directory/company

[LegalizeAdulthood]

The number of new bitsavers files is very large. Break it down by directory/company to make it easier to focus on additions for a single company, i.e. DEC.

[LegalizeAdulthood]

Update ManxDatabase to handle directory/file split in site_unknown and site_unknown_dir tables

• [x] addSiteUnknownPaths
• [x] ignoreSitePath
• [x] getSiteUnknownPathCount
• [x] getSiteUnknownPathsOrderedById
• [x] getSiteUnknownPathsOrderedByPath
• [x] siteIgnoredPath
• [x] getAllSiteUnknownPaths
• [x] removeSiteUnknownPathById
• [x] getPossiblyMovedSiteUnknownPaths
• [x] siteFileMoved
• [x] removeUnknownPathsWithCopy
• [x] getUnknownPathsForCompanies
• [x] markUnknownPathScanned

[LegalizeAdulthood]

This has been implemented.