HINTS added for n-th prime exercise (#243)
HINTS added for n-th prime exercise (#243)

* Cleanup .travis.yml #232

* Added HINTS.md file for nth prime exercise.  Issue #209

* Added HINTS.md for word-search exercise #209

* Revert "Added HINTS.md for word-search exercise #209"

This reverts commit d8ce9a45dd0c2e0aa730fcef96a955b61c601ead.

exercism/xcsharp,robkeim/xcsharp,GKotfis/csharp,ErikSchierboom/xcsharp,ErikSchierboom/xcsharp,exercism/xcsharp,GKotfis/csharp,robkeim/xcsharp