Speech:
* Added new text echo mode "none".
* Report "first/last line" if user is on first/last line in flat review.
* Do not report role for multi-line-text for speech default presentation
mode.
* Improved the response of read whole window command.
* Report to user "Escape" key.
Braille:
* Report "first/last line" if user is on first/last line in flat review.
Miscelaneous:
* Added --login command line option.
* Added -u command line parameter to start magnifier in upper half of screen
