Updated _config.yml File

Updated _config.yml file to reflect new name/author.
Updated Concept

Updated concept screen
Updated Intro, Images, and Download/Install Task

Updated Intro with correct tags, added images, and updated
Download/Install Task.
Updated figures and welcome screen

Updated figures to be in the correct order and the welcome screen to
tell about LibreOffice
Created tasks and format changes

Created tasks for creating a letter, presentation, and spreadsheet. Made
minor format changes in other documents.
Created a shortcut reference and removed templates

Created a Shortcut reference file and removed all given templates.