Add insertion sort explanation + corrected grammar (#147)

* corrected mistakes (again)

* Add insertion sort explanation + corrected grammar

* Update Tri_par_insertion and add examples

* add sections on other algorithms

* changed how examples were shown

* Update Tri_par_insertion.md

* typo in example

Co-authored-by: David Leal <halfpacho@gmail.com>
Co-authored-by: Lars Müller <appgurueu@users.noreply.github.com>

Author: 3 people