Merge pull request #63 from TheAlgorithms/feature/unify-folder-name_lower-case

Lowercase folder names

DIRECTORY.md

@@ -36,18 +36,18 @@
     * [Problem5 Sol1](https://github.com/TheAlgorithms/Ruby/blob/master/project_euler/problem_5/problem5_sol1.rb)
 
 ## Searches
-  * [Binary Search](https://github.com/TheAlgorithms/Ruby/blob/master/Searches/binary_search.rb)
-  * [Depth First Search](https://github.com/TheAlgorithms/Ruby/blob/master/Searches/depth_first_search.rb)
-  * [Linear Search](https://github.com/TheAlgorithms/Ruby/blob/master/Searches/linear_search.rb)
+  * [Binary Search](https://github.com/TheAlgorithms/Ruby/blob/master/searches/binary_search.rb)
+  * [Depth First Search](https://github.com/TheAlgorithms/Ruby/blob/master/searches/depth_first_search.rb)
+  * [Linear Search](https://github.com/TheAlgorithms/Ruby/blob/master/searches/linear_search.rb)
 
 ## Sorting
-  * [Bogo Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/bogo_sort.rb)
-  * [Bubble Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/bubble_sort.rb)
-  * [Bucket Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/bucket_sort.rb)
-  * [Heap Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/heap_sort.rb)
-  * [Insertion Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/insertion_sort.rb)
-  * [Merge Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/merge_sort.rb)
-  * [Quicksort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/quicksort.rb)
-  * [Radix Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/radix_sort.rb)
-  * [Selection Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/selection_sort.rb)
-  * [Shell Sort](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/shell_sort.rb)
+  * [Bogo Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/bogo_sort.rb)
+  * [Bubble Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/bubble_sort.rb)
+  * [Bucket Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/bucket_sort.rb)
+  * [Heap Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/heap_sort.rb)
+  * [Insertion Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/insertion_sort.rb)
+  * [Merge Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/merge_sort.rb)
+  * [Quicksort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/quicksort.rb)
+  * [Radix Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/radix_sort.rb)
+  * [Selection Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/selection_sort.rb)
+  * [Shell Sort](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/shell_sort.rb)