Move vendor/Joomla to src/Joomla. Update necessary paths.
Exclude some files we only need in the repository from the ZIP files generated by GitHub.
Renaming files.

Author:    Ian MacLennan <ianlenmac@gmail.com>
Committer: Ian MacLennan <ianlenmac@gmail.com>
Renaming Classes.
Fixing stuff after move.
Fixing tests and code to accommodate class name changes.
Code cleanup based on PhpStorm inspector
Adding Yaml format to JRegistry
Adding and updating tests.
Updating root composer.json and package symfony/yaml version
Make YAML optional

validate composer
Add composer installation instructions to each package. Closes #13
Tweak usage of Symfony YAML
Merge branch 'yaml-tweak' of https://github.com/fabpot/joomla-framework into JRegistryFormatYaml
Clean up code style. Update tests.
Merge pull request #165 from dongilbert/JRegistryFormatYaml

Make YAML optional
PHPCS cleanup
Make the package unit tests run really standalone.