Add more regression tests

tests/tc004/expected.txt

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+identifiers
+stdint	M
+stdio	M
+stdiobase	M
+stream	M
+string	M

tests/tc004/file.d

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+import std.st
+// Regression test for issue 178

tests/tc004/run.sh

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+set -e
+set -u
+
+dcd-client file.d -c13 > actual.txt
+diff actual.txt expected.txt

tests/tc005/expected.txt

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+identifiers
+ABC	c

tests/tc005/file.d

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+import std.stdio;
+
+final abstract class ABC
+{
+    static @property bool mybool()
+    {
+        return true;
+    }
+}
+
+void main(string[] s)
+{
+    while(!ABC.mybool) {}
+}
+// Regression test for issue 182

tests/tc005/run.sh

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+set -e
+set -u
+
+dcd-client file.d -c154 > actual.txt
+diff actual.txt expected.txt