Notebook with markdown formatting

 * Notes saved in text files
 * Use markdown formatting
 * Optional new note template
 * Optional new note file name template
 * Display media
 * Display OpenStreetMap maps
 * Share notes
 * Add date and time
 * Add media from media providers
 * Receive media from other apps
 * Receive geo uris from other apps
 * Incremental search of notes
 * Dark or light theme for editing
 * Shortcut to open new note
 * Optional CSS styles
 * Optional JavaScript scripts
 * Back up notes to a zip file
 * Optional edit cursor position control
