moved DNA example to example-dna/Readme.md

diff --git a/python/testing/Example2dnasequences.md b/python/testing/example-dna/Readme.md
similarity index 100%
rename from python/testing/Example2dnasequences.md
rename to python/testing/example-dna/Readme.md

diff --git a/python/testing/example2/calculate_gc.py b/python/testing/example-dna/calculate_gc.py
similarity index 100%
rename from python/testing/example2/calculate_gc.py
rename to python/testing/example-dna/calculate_gc.py

diff --git a/python/testing/example2/mean.py b/python/testing/example-dna/mean.py
similarity index 100%
rename from python/testing/example2/mean.py
rename to python/testing/example-dna/mean.py

diff --git a/python/testing/example2/test_calculate_gc.py b/python/testing/example-dna/test_calculate_gc.py
similarity index 100%
rename from python/testing/example2/test_calculate_gc.py
rename to python/testing/example-dna/test_calculate_gc.py

diff --git a/python/testing/example2/test_mean.py b/python/testing/example-dna/test_mean.py
similarity index 100%
rename from python/testing/example2/test_mean.py
rename to python/testing/example-dna/test_mean.py

diff --git a/python/testing/example2/test_transcribe.py b/python/testing/example-dna/test_transcribe.py
similarity index 100%
rename from python/testing/example2/test_transcribe.py
rename to python/testing/example-dna/test_transcribe.py

diff --git a/python/testing/example2/transcribe.py b/python/testing/example-dna/transcribe.py
similarity index 100%
rename from python/testing/example2/transcribe.py
rename to python/testing/example-dna/transcribe.py