[Specification::DSL] Add prepare_command

* master:
  [Gemfile] Require cocoapods-core from the master branch
  [Gemspec] Bump dependencies version

Closes #1274

[Specification] Add support for framework_bundles

* master:
  [Changelog]
  [Changelog]
  Remove an incorrect unit test.
  Add a note to the CHANGELOG about directory restructure.
  Clean up config/sources manager interfaces to not be polluted with old directory structure stuff.
  Add a test for migrating repos to new repo dir.
  Move tempo repos generated by spec_helper to a repos subdir.
  Fix up some comments and add a missing test for config.
  Migrate existing repos when running setup.
  rename cocoapods_dir to home_dir
  Fix some text references to .cocoapods to be .cocoapods/repos
  Move config.yml path back to cocoapods dir.
  Move repos_dir to .cocoapods/repos
  [UI] Add copy&paste friendly dependency to descriptions of Pods

Conflicts:
	CHANGELOG.md
	Gemfile.lock

Closes #743
Closes #1186
Closes #809
Closes #1075

Restructure .cocoapods directory to contain repos as a subdirectory.

Closes CocoaPods/CocoaPods#1073

* master:
  [Command::Spec] Revert template license to MIT (Example)

Conflicts:
	Gemfile.lock

This is done to prevent an user to indicate the wrong license in the spec.
The linter checks for it and fails the validation if the example keyword is
present.

/c @orta