File utils refactor and unittests

Create unit test for file utils
closes #25
closes #26

pcbdevice/utils/TestUtils.py

@@ -0,0 +1,14 @@
+def readIntFile(filePath):
+	completeFile = []
+	file = open(filePath, 'r')
+	lines = file.readlines()
+	file.close()
+	
+	for line in lines:
+		tempArray = []
+		for val in line.split():
+			tempArray.append(int(val))
+			
+		completeFile.append(tempArray)
+	
+	return completeFile