Minimal set up for autotools

- ./configure --with-local-path=/some/path
  --with-<pdk>-source=/some/other/path added; check ./configure --help
- Minimal checks for magic and python version
- .gitignore updated to ignore auto* and open_pdks artifacts
diff --git a/configure b/configure
new file mode 100755
index 0000000..bfa278f
--- /dev/null
+++ b/configure
@@ -0,0 +1,13 @@
+#!/bin/sh
+# From magic
+#
+# Use:  ./configure [args]
+#
+#	where [args] are arguments passed to the scripts/configure script
+#
+# This script is a workaround to GNU autoconf which can't deal with having
+# all of its config scripts in a different directory than the configure
+# script itself.  It also sets up CFLAGS without the default optimizer
+# flag (-O2).
+
+(  cd scripts && ./configure "$@" )