Skip PATH sanity tests outside of omnibus
Merge branch 'skip-path-checks-outside-omnibus'
Add policyfile generator
Merge branch 'policyfile-init'
Add short description of Policyfile syntax
Update version and changelog for 0.3.1
Update changelog and version for 0.3.2
Update code_generator template to latest centos

RE: https://github.com/opscode/chef-dk/issues/177
Merge pull request #212 from martinb3/update_centos

Update code_generator template to latest centos
Improve debugging of HTTP errors for `chef push`

Without the `-D` flag you now will see an error message like:

```
Error: Failed to push policy to the server
Reason: Net::HTTPServerException: HTTP 400 Bad Request: Field 'name'
invalid
```

When the `-D` flag is given, the request and response will be shown in a
format roughly similar to the actual HTTP messages sent and received,
including headers and message bodies.
Extract common code for nested exceptions
Add nested exception features to install command
Move service exception inspectors to separate files
Fix incorrect version in cookbook manifest

CookbookVersion does not clear its memoized manifest data when input
data is mutated; this results in an invalid `name` field when ChefDK
updates the version number.
Don't attempt an upload when all cookbooks exist on the server

Chef Server treats an API request to upload zero files as an error, so
skip the upload when all required cookbooks are present on the server.
Merge branch 'fixup-erchef-api-errors'

fixes #208
Add `--generator-arg` option to generator base

Closes #210, adds an option to the base.rb generator command so that it accepts an arbitrary key=value pairs that can be used to alter the behavior of the generator cookbook. Spoke with @danielsdeleo about this solution being an improvement over https://github.com/opscode/chef-dk/pull/211.

I didn't add any additional unit tests, as it doesn't appear the current set of commandline arguments were being tested systematically. If you all approve of this change, I'd be glad to add additional testing. Thank you!
Additional tests for cookbook generator

Also added a strip call to the keys and values, as `generator_context. key` is not a legal identifier (due to the space).
Add documentation example for --generator-arg
Merge pull request #217 from martinb3/generator_arg

Add `--generator-arg` option to generator base