(minor) style guide: use LOG_TAG
filter 10k lux as well (reported by zbloh on xda discussion)
only feedback real and true readings from sensor to EMA filter
(otherwise readings that come just after bogus ones have too small weight)
(arguable) always replace 0 lux with 1 lux
(otherwise they constantly change over each other in a dim light making auto-brightness to annoying)
(minor) change double -> float as we don't feedback synthetic values anymore
(minor) refactor a bit for sake of readability
advance version to 1.2