Refactor

+ Exercise.java
~ Main.java
~ TriangleExercises.java
~ DiamondExercises.java
Merge branch 'master' of https://github.com/LeightonDarkins/Dev101_IntroProgrammingExcercises

# By LeightonDarkins
# Via LeightonDarkins
* 'master' of https://github.com/LeightonDarkins/Dev101_IntroProgrammingExcercises:
  Create README.md