Modifications to the script to add XML support to the script.

[spikepmw]

The goal of the changes was to allow the user to create an XML file with information (source, name, last chapter downloaded, and download path) about multiple manga series and then allow the user script in conjunction with the XML File to update all corresponding manga series.

• Added ability to parse XML File.
• Added the ability to parse the host sites without user input.
• Removed limitation that the script had to be started from the script's directory. (Image would fail to download, compression would fail, ect because the relative paths were not correct.)

[jklmli]

I like the modifications from looking them over, but I have an exam in about 6 hours. Will test code and probably merge your changes after it's over.