Bitbetter identity Core.dll (#14)

* Added a Key Generating script

To make the keygen process a bit easier I've added a `generate-keys.sh` script that can be found in the `.keys` directory. It will generate the key & cert and bundle them into the required pkcs#12 file automatically when running the build script if none already exist.

* Generate bitbetter/identiry container with modified Core.dll

Added the generation of a second modified container, bitbetter/identity, which contains the modified dll. Fixes #12.

This works on my testing environment but has not gone through extensive testing. I'd recommend a review and cleanup of this commit before it is merged into the develop or master branches.

.keys/generate-keys.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Check for openssl
+command -v openssl >/dev/null 2>&1 || { echo >&2 "openssl required but not found.  Aborting."; exit 1; }
+
+# Remove any existing key files
+[ ! -e cert.pem ]  || rm cert.pem
+[ ! -e key.pem ]   || rm key.pem
+[ ! -e cert.cert ] || rm cert.cert
+[ ! -e cert.pfx ]  || rm cert.pfx
+
+# Generate new keys
+openssl	req -x509 -newkey rsa:4096 -keyout .keys/key.pem -out .keys/cert.cert -days 36500 -subj '/CN=www.mydom.com/O=My Company Name LTD./C=US'  -outform DER -passout pass:test
+openssl x509 -inform DER -in .keys/cert.cert -out .keys/cert.pem
+openssl pkcs12 -export -out .keys/cert.pfx -inkey .keys/key.pem -in .keys/cert.pem -passin pass:test -passout pass:test
+
+ls