basics and tests done.

tests/test_utils.py

@@ -0,0 +1,21 @@
+import pytest
+
+from cristallina.utils import ROI, print_run_info
+
+__author__ = "Alexander Steppke"
+
+def test_print(capsys):
+
+    print_run_info(247)
+    captured = capsys.readouterr()
+    assert "15453208940" in captured.out
+    assert "LiTbF4_rocking" in captured.out
+
+
+	
+def test_ROI():
+    """API Tests"""
+    r = ROI(left=1, right=2, top=4, bottom=2)
+
+    assert r.width == 1
+    assert r.height == 2