last one should be textFiles, and video should be videos

Fixed, thx @ruebot

Here is what we need to update in current based off of #21 (@lintool we need you to do your review on that so we can move forward here please.)

extractValidPages

$ ag -R extractValidPages current 
current/collection-analysis.md
35:RecordLoader.loadArchives("src/test/resources/warc/example.warc.gz", sc).extractValidPagesDF()
78:RecordLoader.loadArchives("src/test/resources/warc/example.warc.gz", sc).extractValidPagesDF()

current/index.md
22:  .extractValidPagesDF()
34:  .extractValidPagesDF()

current/text-analysis.md
69:  .extractValidPagesDF()

current/link-analysis.md
333:          .extractValidPagesDF()

current/df-results.md

extractHyperlinks

$ ag -R extractHyperlinks current
current/index.md
61:  .extractHyperlinksDF()
73:  .extractHyperlinksDF()

extractImage

$ ag -R extractImage current
current/index.md
118:val df = RecordLoader.loadArchives("example.arc.gz", sc).extractImageDetailsDF();
143:val df = RecordLoader.loadArchives("example.arc.gz", sc).extractImageDetailsDF();
187:- Images: `extractImageDetailsDF()`

current/image-analysis.md
25:  .extractImageDetailsDF();
85:  .extractImageDetailsDF();
186:  .extractImageLinksDF();

extractPDF

$ ag -R extractPDF current  
current/index.md
188:- PDFs: `extractPDFDetailsDF()`
224:val df = RecordLoader.loadArchives("example.arc.gz", sc).extractPDFDetailsDF();

current/binary-analysis.md
157:  .extractPDFDetailsDF();
214:  .extractPDFDetailsDF();

extractAudio

$ ag -R extractAudio current
current/binary-analysis.md
30:  .extractAudioDetailsDF();
82:  .extractAudioDetailsDF();

current/index.md
186:- Audio: `extractAudioDetailsDF()`

extractVideo

$ ag -R extractVideo current
current/index.md
192:- Videos: `extractVideoDetailsDF()`
201:val df = RecordLoader.loadArchives("example.media.warc.gz", sc).extractVideoDetailsDF();

current/binary-analysis.md
685:  .extractVideoDetailsDF();
742:  .extractVideoDetailsDF();

`extractSpreadsheet

$ ag -R extractSpreadsheet current 
current/binary-analysis.md
421:  .extractSpreadsheetDetailsDF();
478:  .extractSpreadsheetDetailsDF();

current/index.md
190:- Spreadsheets: `extractSpreadsheetDetailsDF()`

extractPresentationProgram

$ ag -R extractPresentationProgram current
current/index.md
189:- Presentation program files: `extractPresentationProgramDetailsDF()`

current/binary-analysis.md
289:  .extractPresentationProgramDetailsDF();
346:  .extractPresentationProgramDetailsDF();

extractWordProcessor

$ ag -R extractWordProcessor current      
current/index.md
193:- Word processor files: `extractWordProcessorDetailsDF()`

current/binary-analysis.md
817:  .extractWordProcessorDetailsDF();
874:  .extractWordProcessorDetailsDF();

extractTextFile

$ ag -R extractTextFile current     
current/index.md
191:- Text files: `extractTextFilesDetailsDF()`

current/binary-analysis.md
553:  .extractTextFilesDetailsDF();
610:  .extractTextFilesDetailsDF();