allow more complex configuration structure and fix readme

Author: khalilgharbaoui

README.md

@@ -15,7 +15,7 @@ You'll need to install Aspell:
 
 ## Configuration
 
-In order to change configuration, you need to create `.pronto_spell.yaml` file in your project root directory. Awailable options are:
+In order to change configuration, you need to create `.pronto_spell.yml` file in your project root directory. Awailable options are:
 
 ```YAML
 suggestion_mode: 'fast' # default

lib/pronto/spell.rb

@@ -9,13 +9,13 @@ class Spell < Runner
 
     def ignored_words
       @ignored_words ||= begin
-        Set.new(spelling_config['ignored_words'].to_a.map(&:downcase))
+        Set.new(spelling_config['ignored_words'].to_a.flatten.map(&:downcase))
       end
     end
 
     def keywords
       @keywords ||= begin
-        Set.new(spelling_config['only_lines_matching'].to_a.map(&:downcase))
+        Set.new(spelling_config['only_lines_matching'].to_a.flatten.map(&:downcase))
       end
     end
 

lib/pronto/spell/version.rb

@@ -2,6 +2,6 @@
 
 module Pronto
   module SpellVersion
-    VERSION = '0.11.0'
+    VERSION = '0.11.1'
   end
 end