Merge branch 'release/0.0.53' into develop
readme: improve readability
src: improve readability

improve readability
test: improve readability
src: add instance method 'setIdentity()'
test: add instance method 'setIdentity()' testings
readme: add instance method 'setIdentity()' api
readme: improve the readability
lint: add some files for linting pass
npm: 0.0.53 -> 0.0.54
Merge branch 'release/0.0.54'