Merge branch 'release/0.0.78' into develop
src: add instance method 'inverse()' for PartialPivLU and CPartialPivLU
test: add instance method 'inverse()' testings
readme: add instance method 'inverse()' for PartialPivLU and CPartialPivLU
lint: add some files for linting  pass
readme: improve api
npm: 0.0.78 -> 0.0.79
readme: improve the descriptions of some api
Merge branch 'release/0.0.79'