adding EveApiXmlNetworkRetriever.php, GuzzleNetworkRetriever.php, NetworkRetrieverAbstract.php, and Network/NetworkRetrieverInterface.php to handle downloading api data over http
removed Guzzle specific namespaces from NetworkRetrieverInterface.php and NetworkRetrieverAbstract.php. Removed Guzzle specific code from EveApiXmlNetworkRetriever.php. Fixed styling issues and cleaned up some code syntax.
Merge branch '1.1.x-WIP' of github.com:Dragonrun1/yapeal into 1.1.x-WIP
Merge branch '1.1.x-WIP' of github.com:Dragonrun1/yapeal into 1.1.x-WIP