App pulls events from hg.gatech.edu

Added XmlReader class to pull XML from a Mercury feed, and use that data
to create an ArrayList to give to the EventListActivity. It is really
slow.
added preference activity with headers and preferences resources
Fixed HTML formatting issue in details

The event description now displays as HTML instead of plaintext, where
all the tags were shown. Also removed some unnecessary JAR files and
updated the min SDK to 11.
Merge branch 'xml_reader' into develop

Conflicts:
	project.properties