Update changes from Beta13 to Beta 14

These edits bring the How To doc up to date with Beta 14. Changes
include (relating to issue numbers):

#113 - now says it takes you to this page

# 145 picture of Voice Activated Commentary screen updated to reflect
change of save button to icon.

# 120  language selection for a recording is now opt in

#147 beep at end of voice activated commentary noted

Also, removed information on audio-recognising box, including removing
images.