Exercise 2 - Reverse-String

[gyssels]

First: thank you for your help!
Request specifications:

Please work from the Exercise-2-reverse-string branch.

reverse-string exercism files to implement:

• .\exercises\reverse-string\ReverseString.tests.ps1 as specified in https://github.com/exercism/problem-specifications/blob/master/exercises/reverse-string/canonical-data.json
• .\exercises\reverse-string\ReverseString-example.ps1, your solution as specified in .\exercises\reverse-string\README.md

Do not touch, as it will not be merged:
.\config.json
.\exercises\reverse-string\README.md

[gyssels]

Created a new Exercise-2-reverse-string branch for working with this exercise.

[gyssels]

done