Added tests for c++ source and header files and java files. (#107)

* Added tests for c++ source and header files and java files.

* Added VHDL to languages and tests

* Updated readme

Updated to reflect VHDL being added to languages

tests/data/cpp.cpp

@@ -0,0 +1,15 @@
+/* 15 lines 7 code 4 comments 4 blanks */
+
+#include <iostream>
+
+
+using namespace std;
+
+/*
+ * Simple test
+ */
+int main()
+{
+    cout<<"Hello world"<<endl;
+    return 0;
+}