PowerBright 1.0s (updated)

v1.0s:
- Minor update for Sony CLIE users: Back/Jog hold support.
v1.0:
- More efficient method of hold detection: now holding 'Power' works at startups too.
- Users can now choose the hardware button to hold: choosing other button than 'Power' was reported to solve the no-effect issue under LD/TX.