Make the integration test script work from anywhere.

scripts/run_integration_test.bash

@@ -4,9 +4,7 @@ set -euo pipefail
 IFS=$'\n\t'
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
-cd "$DIR/../"
-
-samples_dir=$(readlink -f "org_mode_samples")
+samples_dir=$(readlink -f "$DIR/../org_mode_samples")
 
 function get_test_names {
     for test_file in "$@"
@@ -23,5 +21,5 @@ function get_test_names {
 }
 
 get_test_names "$@" | while read test; do
-    cargo test --no-fail-fast --test test_loader "$test"
+    (cd "$DIR/../" && cargo test --no-fail-fast --test test_loader "$test")
 done