Generate Extension Xml For Connect

Add the ability to generate the extension xml file using
the extension name for connect.
Rename Method Names
fixing missing extension key
Remove Extension Xml From Tgz

Add logistics to add the extension name xml under var/connect folder
and outside of the .tgz tarball.
Merge pull request #9 from rgabruel/connect_extension_xml_generator

Generate Extension Xml For Connect
Merge branch 'master' of github.com:astorm/MagentoTarToConnect