Run defined raketask on start by default [lukasztackowiak]

README.md

@@ -47,6 +47,7 @@ the watched files change.
 ``` ruby
 :task => 'doit'              # name of the task to be executed, required
 :run_on_all => false         # runs when the 'run_all' signal is received from Guard (enter is pressed), default: true
+:run_on_start => true        # runs when guard is started, default: true
 ```
 
 ## Development

lib/guard/rake.rb

@@ -4,11 +4,10 @@
 
 module Guard
   class Rake < Guard
-    include ::Rake::DSL
-
     def initialize(watchers=[], options={})
       super
       @options = {
+        :run_on_start => true,
         :run_on_all => true
       }.update(options)
       @task = @options[:task]
@@ -18,6 +17,7 @@ def start
       UI.info "Starting guard-rake #{@task}"
       ::Rake.application.init
       ::Rake.application.load_rakefile
+      run_all if @options[:run_on_start]
       true
     end