refactor cfg as object

- now default type is 'nil', which is collapsed to flat config via
  Outputs#to_cfg

- if type is not 'nil' then name is automatically set if not set by
  model

- if name and type is set, separate file is created

- if name is not set, but type is set, outputs from type are collapsed
  as with 'nil' types

This model:
  cmd 'show ip cef' do |out|
    out.type = 'poop'
    out.name = false
    out
  end

  cmd 'show process cpu' do |out|
    out.type = 'poop'
    out.name = 'my_cpu'
    out
  end

  cmd 'show memory statistics' do |out|
    out.type = 'poop'
    out.name = false
    out
  end

  cmd 'show ip bgp summary' do |out|
    out.type = 'poop'
  end

Would produce git output:
[ytti@ytti.fi ~/.config/oxidized]% ls poop
bu.ip.fi  bu.ip.fi--cpu  bu.ip.fi--show_ip_bgp_summary
[ytti@ytti.fi ~/.config/oxidized]%

bu.ip.fi contains the collapsed stuff
bu.ip.fi--cpu is manually named
bu.ip.fi--show_ip_bgp_summary is automatically named

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/oxidized/output/file.rb b/lib/oxidized/output/file.rb
index 2d08106..03c878a 100644
--- a/lib/oxidized/output/file.rb
+++ b/lib/oxidized/output/file.rb
@@ -14,14 +14,14 @@ class OxidizedFile < Output
     end
   end
 
-  def store node, data, opt={}
+  def store node, outputs, opt={}
     file = @cfg.directory
     if opt[:group]
       file = File.join File.dirname(file), opt[:group]
     end
     FileUtils.mkdir_p file
     file = File.join file, node
-    open(file, 'w') { |fh| fh.write data }
+    open(file, 'w') { |fh| fh.write outputs.to_cfg }
   end
 
   def fetch node, group