test: add test samples

Adds test samples that can be used for unit tests or to verify
implementations via:
```bash
for sample in $(ls src/test/resources/samples/*.txt)
do
  echo "Validating $sample"
  rm -f measurements.txt
  ln -s $sample measurements.txt

  diff <(./calculate_average.sh) ${sample%.txt}.out
done
rm measurements.txt
```

For #61

1 files changed, 10 insertions, 0 deletions

diff --git a/src/test/resources/samples/measurements-10.txt b/src/test/resources/samples/measurements-10.txt
new file mode 100644
index 0000000..786a66f
--- /dev/null
+++ b/src/test/resources/samples/measurements-10.txt
@@ -0,0 +1,10 @@
+Halifax;12.9
+Zagreb;12.2
+Cabo San Lucas;14.9
+Adelaide;15.0
+Ségou;25.7
+Pittsburgh;9.7
+Karachi;15.4
+Xi'an;24.2
+Dodoma;22.2
+Tauranga;38.2