Add gendoc command

Using the new, great auto-doc in Cobra.

This commit also contains a current result of that command added to a commands section in docs.

Fixes #1136

docs/content/commands/hugo_config.md

@@ -0,0 +1,53 @@
+---
+date: 2015-05-13T11:12:54+02:00
+title: "hugo config"
+slug: hugo_config
+url: /commands/hugo_config/
+---
+## hugo config
+
+Print the site configuration
+
+### Synopsis
+
+
+Print the site configuration, both default and custom settings
+
+```
+hugo config
+```
+
+### Options
+
+```
+  -h, --help=false: help for config
+```
+
+### Options inherited from parent commands
+
+```
+  -b, --baseUrl="": hostname (and path) to the root eg. http://spf13.com/
+  -D, --buildDrafts=false: include content marked as draft
+  -F, --buildFuture=false: include content with datePublished in the future
+      --cacheDir="": filesystem path to cache directory. Defaults: $TMPDIR/hugo_cache/
+      --config="": config file (default is path/config.yaml|json|toml)
+  -d, --destination="": filesystem path to write files to
+      --disableRSS=false: Do not build RSS files
+      --disableSitemap=false: Do not build Sitemap file
+      --editor="": edit new content with this editor, if provided
+      --ignoreCache=false: Ignores the cache directory for reading but still writes to it
+      --log=false: Enable Logging
+      --logFile="": Log File path (if set, logging enabled automatically)
+      --pluralizeListTitles=true: Pluralize titles in lists using inflect
+  -s, --source="": filesystem path to read files relative from
+      --stepAnalysis=false: display memory and timing of different steps of the program
+  -t, --theme="": theme to use (located in /themes/THEMENAME/)
+      --uglyUrls=false: if true, use /filename.html instead of /filename/
+  -v, --verbose=false: verbose output
+      --verboseLog=false: verbose logging
+```
+
+### SEE ALSO
+* [hugo](/commands/hugo/)	 - Hugo is a very fast static site generator
+
+###### Auto generated by spf13/cobra at 2015-05-13 09:12:54.400622559 +0000 UTC