Add local pack script. Remove dnx451 framework references. May add back later if needed.

pack-local.sh

@@ -0,0 +1,22 @@
+versionSuffix=$1
+dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+projects=(
+    ./src/Microsoft.AspNetCore.NodeServices
+    ./src/Microsoft.AspNetCore.SpaServices
+    ./src/Microsoft.AspNetCore.AngularServices
+    ./src/Microsoft.AspNetCore.ReactServices
+)
+
+if [ -z "$versionSuffix" ]; then
+    echo "Usage: pack-local.sh <versionsuffix>"
+    echo "Example: pack-local.sh beta-000001"
+    exit 1
+fi
+
+pushd $dir > /dev/null
+
+for proj in "${projects[@]}"; do
+    dotnet pack $proj --version-suffix $versionSuffix -o ./artifacts/
+done
+
+popd > /dev/null