Program now has basic functionality
IPScanner.cs
Reimplemented buildIPTable as an async method
Added three overloaded methods to buildIPTable that accept delegates
Broke writeTable method into two methods: writeIPTable and writeHTMLTable
Added setRangeLength method

GUI:
Added Progress Bar
Added Current IP Label
Number fields auto highlight value on tab
Removed Test button
Copies fromIP values to toIP values as the user fills out the number fields
Only runs if the IP range specified is positive