PPT files

It is just a suggestion. This gem not support ppt files, so. If the scenario is extract the content from each ppt slide this gem does not help. 
The code below convert the ppt file in a pptx file.
`libreoffice --headless --invisible --convert-to pptx *.ppt`
Maybe put this code to convert the file is a way to support ppt.
Anyway tnks for this gem, help me a lot.
