Added flag.io plugin

usage: upload <file> [<file> ...]

plugins/flagio/flagio.plugin.zsh

@@ -0,0 +1,15 @@
+# Upload files to flag.io
+upload() {
+  if [ $# -lt 1 ]; then
+    printf 'usage: upload <file> [<file> ...]\n'
+    return 1
+  fi
+
+  for path in $@; do
+    if [ -f "$path" ]; then
+      curl -sT "$path" flag.io | egrep -v '^#'
+    else
+      printf 'File not found: %s\n' "$path"
+    fi
+  done
+}