Initial Commit
Merge branch 'master' of https://github.com/regehr/solid_code_class into CodysBranch
Working on is_legal_triangle.  Introduced the concept of slope for checking points along a stright line.
Merge branch 'master' of https://github.com/regehr/solid_code_class into CodysBranch
Finished is_illegal_triangle.
Calculation of sides and angles.
Calculation of triangle types.