Merge pull request #151 from bvssvni/master

Added col_mat4_transform
Merge pull request #157 from bvssvni/master

Added row_mat4_transform
Merge pull request #158 from bvssvni/master

Added col_mat3_transform
Merge pull request #159 from bvssvni/master

Added row_mat3_transform
Add rust-ci
Merge pull request #160 from Indiv0/add-rust-ci

Add rust-ci
Remove Rust-empty
Merge pull request #161 from Indiv0/remove-rust-empty

Remove Rust-empty
Add IRC Notifications
Merge pull request #162 from Indiv0/add-irc-notifications

Add IRC Notifications
Added `vec2_cast`

Closes https://github.com/PistonDevelopers/vecmath/issues/165