Switch NEFARIO_CONFIG_DIRECTORIES to use colon as separator.

Switch NEFARIO_CONFIG_DIRECTORIES to use colon as separator.

diff --git a/README.md b/README.md
index 7102e88..4430be1 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ As per the principles of the [12-factor app](https://12factor.net), Nefario is
 configured entirely via environment variables.  Only the `NEFARIO_CONFIG_DIRECTORY`
 variable is required.
 
-* **`NEFARIO_CONFIG_DIRECTORIES`**: comma seperated string of directories to watch for modified configuration files.  The directories must exist before Nefario is started.
+* **`NEFARIO_CONFIG_DIRECTORIES`**: colon seperated string of directories to watch for modified configuration files.  The directories must exist before Nefario is started.
 
 * **`NEFARIO_MOUNT_ROOT`**: (default: `/srv/docker`) The filesystem path where
   all pod volumes should be created.
diff --git a/Rakefile b/Rakefile
index 0d991d6..ec71c07 100644
--- a/Rakefile
+++ b/Rakefile
@@ -25,7 +25,7 @@ end
 desc "Run sample local nefario"
 task :run_local do
   $LOAD_PATH.unshift(File.expand_path(".", "lib"))
-  ENV["NEFARIO_CONFIG_DIRECTORIES"] = "#{File.expand_path(".", "sample/pods")},#{File.expand_path(".", "sample/pods_2")}"
+  ENV["NEFARIO_CONFIG_DIRECTORIES"] = "#{File.expand_path(".", "sample/pods")}:#{File.expand_path(".", "sample/pods_2")}"
   ENV["NEFARIO_METRICS_PORT"] = "9408"
   load(File.expand_path(".", "bin/nefario"))
 end
diff --git a/lib/nefario/config_dir_watcher.rb b/lib/nefario/config_dir_watcher.rb
index ef65011..84418df 100644
--- a/lib/nefario/config_dir_watcher.rb
+++ b/lib/nefario/config_dir_watcher.rb
@@ -16,7 +16,7 @@ class Nefario::ConfigDirWatcher
 
   def run
     notifier = INotify::Notifier.new
-    config_directories = @config.config_directories.split(",")
+    config_directories = @config.config_directories.split(":")
 
     config_directories.each do |config_directory|
       notifier.watch(config_directory, :move, :close_write, :delete) do |event|
diff --git a/lib/nefario/image_watcher.rb b/lib/nefario/image_watcher.rb
index 9d30a72..e092a97 100644
--- a/lib/nefario/image_watcher.rb
+++ b/lib/nefario/image_watcher.rb
@@ -41,7 +41,7 @@ class Nefario::ImageWatcher
   def refresh_all_images
     image_map = Hash.new { |h, k| h[k] = ImageInfo.new(k, @docker_config, logger) }
 
-    @config.config_directories.split(",").each do |config_directory|
+    @config.config_directories.split(":").each do |config_directory|
       Pathname.new(config_directory).each_child do |podfile|
         next unless podfile.basename.to_s =~ /(\A[^.]|\.yaml\z)/
 

GitHub sha: 4aab96bd