add getPitch method to einkfb.c
add getPitch method to screen.lua
add pitch argument to newBlitBufferNative
bug fix: getPitch should return line_length/2
Screen:saveCurrentBB: pass pitch on creating new blitbuffer
move fake event handling to ui.lua

inputevent.lua now only forwards events
leave cvm proccess running on KPV start and SS resume

Otherwise, lipc-wait-event won't be able to catch any events
Merge pull request #699 from houqp/new_ui_fix

Bring back screen saver support