* issue fixed

* minor bug fixed

* #941 fixed

* #941 fixed

* triangle: topics added

* '#925-addTopics'

* added topic for spiral-matrix

* added topic for spiral-matrix

* Update config.json

* added topics for run length encoding

* added changes for run length encoding

* formatting

* formatting

Close #936

Close #922

* Add topics to forth. Fixes #851

* Add topics to forth. Fixes #851
* Add topics exception_handling, strings, lists, logic to forth

* Add topics to custom set. Fixes #937

* Add topics to custom set. Fixes #937
* Add generics to list of topics for custom set

* Add topics to binary search tree. Fixes #939

* Add topics to binary search tree. Fixes #939
* Add generics to topics for binary search tree
* Remove recursion from topics for binary search tree

* #925 add topics to simple linked list exercise

* added exception_handling to topics for simple linked list

* added topics for book store

* added topic to book stores

* Issue #923 add topics to linked list

* Update linked-listst Topics with generics

* Added topics for sublist problem

* Added enumeration and generics to sublist topics

* Added topics for sublist problem

* added topics for robot-name

* added changes to topics for robot name 920

* Add topics to all-your-base problem

* Add exception_handling topic

* added topics in bracket-push, simple-cipher, crpto-square and atbash-cipher

* added topics in bracket-push, simple-cipher, crpto-square and atbash-cipher

* topics added for slug- palindrome- products

* modified topics for slug- palindrome-products

* added topics for robot simulator

* removed algorithms as topic

* 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

The binary-search tests force the practitioner to generify the class
but only one type (integer) was actually being used in the tests.
This should be changed so that more than one type is actually used, to
make it more clear that generics are necessary and to demonstrate how
generics is used.

As discussed in #230, move linked-list to one of the last difficulty 6
exercises, so that binary-seach is the first exercise that introduces
generics.

Add a hint to the binary-search exercise to explain generics as this
is now the first exercise to require it.

Fixes #230.

* 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".