Merge branch 'release/0.0.25' into develop
src: fixed a mistake
src: added instance method 'determinant()'
test: added instance method 'determinant()' testings
Merge branch 'feature/instance_method_determinant' into develop
readme: updated some api and added instance method 'determinant()' api
npm: 0.0.25 -> 0.0.26
Merge branch 'release/0.0.26'