Fix about_constants koan

* nested constants accessed with relative paths

* top level constants referenced with ::

* nested classes inherit constants from the 
  enclosing classes

* sub-classes inherit from constants from the 
  parent class

* nested trumps inherited

* unless explicitly scoped

[#54145659]
Fix about_triangle_project koan

* Easier than I thought it would be.

* When it passed the first time I coded it up
  in IRB to make sure it was right.

* Had to add "./" to require statement.

[#54145671]
Merge pull request #12 from bayendor/54145659_about_constants_master

Fix about_constants koan

[Delivers #54145659]
Merge pull request #15 from bayendor/54145671_about_triangle_project_master

Fix about_triangle_project koan

[Delivers #54145671]