Merge branch 'release/0.0.64' into develop
src: add checking for argument 'n'
test: update throw messages
src: add instance method 'bottomRows()'
test: add instance method 'bottomRows()' testings
lint: add some files for linting pass
npm: 0.0.64 -> 0.0.65
readme: add instance method 'bottomRows()' api
Merge branch 'release/0.0.65'