Merge pull request #5 from JulianHentea/54145899_about_array_assignment_master

Learned the array assignment

[Delivers #54145899]
Learning about Arrays 
  * Ranges
  * Slicing with ranges
  * Pushing & popping
  * Shifting 

[#54145897]
Updated the about_arrays koans file
Approved

Merge branch '54145897_about_arrays_master'