Trying to fix the Wordpress sketch for the new framework.
Omit cfengine_stdlib.cf from inputs in non-standalone runfile, because it will already be included by promises.cf.
negative_knowledge HOWTO
Merge branch 'master' of github.com:tzz/design-center into howto
Merge pull request #227 from tzz/howto

Negative knowledge HOWTO
Update howto/negative_knowledge.md
negative_knowledge: define "knowledge"
Merge pull request #225 from zzamboni/omit_stdlib_in_deploy_runfile

Omit cfengine_stdlib.cf from inputs in non-standalone runfile.
Merge remote-tracking branch 'upstream/master' into fix_wordpress
Correct the README to match the latest version of the sketch
Merge pull request #233 from ncharles/documentation/correct_vcs_mirror_documentation

Correct the README to match the latest version of the sketch VCS_mirror

Thanks you @ncharles.  Good catch.
Bug fixing

A number of bugs had crept into the wordpress_install sketch when
porting to the new Design Center framework. I've fixed all that I could
find, so that the sketch again runs properly. I also improved and fixed
the sample params/wordpress.json file.
Merge pull request #235 from zzamboni/fix_wordpress

Fix wordpress sketch.
db_install: provide fallback packages and server_packages
db_install: add a mysql.json demo parameter set
Merge branch 'master' of github.com:cfengine/design-center
db_install: remove specificity for 5.1 version
Merge pull request #236 from tzz/master

db_install fixes
Add example enable and disable wifi based on dockinstation status
This policy looks for connected docking station in lsusb output.
If the docking station is present, and wifi is enabled it disables wifi
via network manager. If the docking station is not present, and wifi is
disabled it enables wifi via network manager.
Add example policy to sketch definition
The test/example policy needs to be installed with a sketch as a
reference.