add initializer and remove private ivar
rename initializer
remove events controller and cleaning
add input controller
bulk commit
test github access
remove unnecessary test
add mapping controller and add mapping store
fix previous commit
add gitignore
add everything idea to gitignore
add keydown and keyup handlers
bulk commit
add test for modifier keys
clean
add condotion for input set
bulk commit
add SKMappingStore delegate and fix input with modifier flags
add doc block
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