Add VTEC class

Add new class for parsing info out a VTEC string.
Remove Bzip2 library

Remove code for decompressing bzip2 archives.  We don’t need it anymore.
Add XML parsing code

Add code to fetch and parse the NWS alerts xml feed.
Add databases

Add databases for the counties info and radar sites info.
Test XML code functionality
Setup class to fetch radar image
Setup class to open the sites database