Merge pull request #126 from bvssvni/master

Fixed bug, added mat2x3_id
Merge pull request #127 from bvssvni/master

Added `mat3x2_id`
Merge pull request #128 from bvssvni/master

Call `mat2x3_id` in unit test
Merge pull request #129 from bvssvni/master

Added `mat3_id`
Merge pull request #130 from bvssvni/master

Added `mat3x4_id`
Merge pull request #131 from bvssvni/master

Added `mat4x3_id`
Merge pull request #132 from bvssvni/master

Added `mat4_id`
Merge pull request #133 from bvssvni/master

Added `row_mat3_mul_row`
Fixed Cargo issues

* Ignored Cargo.lock
* Removed unused fields in Cargo.toml