'SeeAlso' field can be a string. Added InvalidCastException handling.
Added BugSearchOptions and GetBugSearchResultsAsync
Remove last vestiges of my test project.
see_also is an array of strings
Fix issues identified by Bojan in BugSearchOptions PR

A straight reformat would have added spaces in between
all the property declarations in Bug.cs, but I left it the way
that it was.

The rest of the feedback has been incorporated into these changes.
Merge pull request #3 from pjbeaman/master

Add bug searches