Put guards into groups.

Now I can just run the :specs group and run all specs
without generating the man pages.

In addition I enabled the full BDD cycle for development,
not sure why it wasn't enabled. Feel free to revert if there
is a specific reason for that.

Guardfile

@@ -1,11 +1,15 @@
-guard :rspec, :version => 2, :all_on_start => false, :all_after_pass => false, :keep_failed => false, :cli => '--format doc' do
+group :specs do
+  guard :rspec, :cli => '--format doc' do
     watch(%r{^spec/.+_spec\.rb$})
     watch(%r{^lib/(.+)\.rb$})     { |m| "spec/#{m[1]}_spec.rb" }
     watch('spec/spec_helper.rb')  { "spec" }
+  end
 end
 
-guard :ronn do
+group :docs do
+  guard :ronn do
     watch(%r{^man/.+\.ronn?$})
+  end
 end
 
 # require 'guard/guard'