* master:
  [Specs] Fix repo specs.

* master:
  [Repo] Use raising bang variant for git operations.

* master:
  [Repo] Use raising bang variant for git operations.
  [Source] Allow the specify the master repo dir from an environment variable.
  [Linter] Improved checks for the summary and the git tag.
  [Repo] Fix banner.
  [Source] list the name of the repos.
  [Changelog]
  [Config] Added update_notification attribute.
  Support extracting .tar.bz2 files

The variable is `CP_MASTER_REPO_DIR` and potentially paves the way for
supporting a deeper linting of CocoaPods/Specs. Every check would be
supported, including checking that the files patterns match, except
xcodebuild checks.

Support extracting .tar.bz2 files

Closes #448

* master:
  [Executable] Added environment variable to force STDOUT sync.
  [Command] Don't run setup if needed for `pod setup`.
  Specs for updating a cached repo if the specified branch is missing.
  Update a pod's cached git repo if the specified branch isn't found.

Conflicts:
	lib/cocoapods/downloader/git.rb

This lead to a double execution of setup if the automatic setup triggered.

Update git repo cache if branch isn't found

Chartboost (and likely other sites) distribute source code in bz2
format.  Support for recognizing and extracting these files will come in
handy.

* master:
  Release 0.14.0
  [Bundle] Update.
  [Rakefile] Allow to update the changelog during a release.
  [Gemspec] Bump dependency of Xcodeproj.
  [Changelog]
  Update AppleDoc install instructions
  [Rakefile] Fix Travis.
  [Rakefile] Fix Travis.
  [Rakefile] Fix Travis.
  [Specification] Don't include the name of the preferred dependency in to_s.
  [Lockfile] Make path if needed before writing.

Update AppleDoc install instructions

@tomaz tagged a new version of AppleDoc which resolves the issue requiring
the `--HEAD` param to `brew`, and @adamv [pulled in the change](https://github.com/mxcl/homebrew/pull/14693)
to mxcl/homebrew that both updates to the new code and also uses
the [new compile-time template location](https://github.com/tomaz/appledoc/pull/231)
to avoid the second step.

This caused a Bug that lead to Pods with preferred dependencies to be always
installed.

Closes CocoaPods/Specs#464.

Should fix Travis errors.