* Add topics to flatten-array

* Fixed identation to 2 spaces

* Added Tournament exercise

* Added to config and refactored after review

* Added topics and fixed indentation

* Must be unlocked by a core exercise

* Adding topics to prime factors

* Adding math as problem area

* Removing recursion as a topic

* Completes #853

* Add more topics to problem Kindergarten-garden

* Correct the identation

* Correct the identation again

* added topics to perfect numbers

* updated topics

* fixed tabs

Removed recursion

Re-arrange to put "loops" before "maps".

;)

added topics for word search

added topics for the queen-attack problem

Added @FridaTveit suggestions to nucleotide-count topics

* Updated Food-Chain Topics :)

* Removing plus signs from tags for food-chain

* minus comma

Added four tags to nucleotide-count topics as described in #808.