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.
Remove the IS_WIN constant.
Renaming files.

Author:    Ian MacLennan <ianlenmac@gmail.com>
Committer: Ian MacLennan <ianlenmac@gmail.com>
Renaming Classes.
Fixing stuff after move.
Code cleanup based on PhpStorm inspector
Add composer installation instructions to each package. Closes #13
Make the package unit tests run really standalone.