anagram - few changes thanks to @etrepum

* export function explicitly
* explictly store the sorted & lowered result.
word-count - strictness issue

thanks to @soapie and @etrepum
anagram - fix impl
wordcount - explicit export
ex 4.47 - done
ex 4.48 - skipped
ex 4.49 - skipped
4.3.3 - impl the amb evalator
4.3.3 - execution proc and cont (+ some comments)
4.3.3 - struct of the evaluator
rna-transcription - refinement
bob - refinement
nucleotide-count - working
amb-eval - might be a fresh start ...
amb-eval - try to reuse functions from my-eval
DNA - first version
point mutations - first version
fetch phone-number
Merge branch 'exercism'
Merge branch 'sicp'