add Kana set to character ROM

update fitter seed to more optimal value

Merge branch 'paulb-nl-samplerate' into release

Merge branch 'rv-integration' into release

add a list of contributors

pcm1862: add pre-ADC gain setting

Merge branch '511141-patch-10' into release

Misc small fixes and improvements

* Disable 480p scanlines in auto mode
* Remove inoperable 3x/4x processing modes from 1080i list
* Add 640x512 mode to 480p group and limit 480p sampler option to 525-line modes
* Fix occasional pixel repetion issue after HDMI<->DVI TX switch
* Add "Allow upsample2x" option
* Add comments to some unclear sections

Fix HDTV mode parameters

Add 288p line5x modes and hotkey for quick mode select