Changes to aliases and restart tools

- added _restart_plasma utility funtion
 - made python aliasing more robust
 - added pip enviornment config to avoid nag messages
 - moved toolchain setup to a single file

toolchains.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+
+## Node
+#
+# echo 'prefix = ~/.node' > ~/.npmrc
+#
+if [[ -d ~/.node ]]; then
+  if [[ -d ~/.node/bin ]]; then
+    export PATH="$HOME/.node/bin:$PATH"
+  fi
+  export NODE_PATH="$HOME/.node/lib/node_modules:$NODE_PATH"
+
+fi
+
+## Express IDF for ESP32s
+if [[ -e "/opt/esp32/esp-idf" ]]; then
+	export IDF_TOOLS_PATH=/opt/esp32/expressif
+	alias get_idf='. /opt/esp32/esp-idf/export.sh'
+fi