Add some more stubs files for exercises

Hello world was already added in exercism#122, add to next 4 exercises
(to make it 5)

Fixes exercism#121

exercises/anagram/src/anagram.clj

@@ -0,0 +1,5 @@
+(ns anagram)
+
+(defn anagrams-for [] ;; <- arglist goes here
+  ;; your code goes here
+)

exercises/bob/src/bob.clj

@@ -0,0 +1,5 @@
+(ns bob)
+
+(defn response-for [] ;; <- arglist goes here
+  ;; your code goes here
+)

exercises/rna-transcription/src/rna_transcription.clj

@@ -0,0 +1,5 @@
+(ns rna-transcription)
+
+(defn to-rna [] ;; <- arglist goes here
+  ;; your code goes here
+)

exercises/word-count/src/word_count.clj

@@ -0,0 +1,5 @@
+(ns word-count)
+
+(defn word-count [] ;; <- arglist goes here
+  ;; your code goes here
+)