UP-4113 : update issue tracker URL in quickstart readme.
UP-4114: Update uPortal website URL.
UP-4115 Fix typos in docs.
UP-4116 Remove reference to -dev quickstart.

No longer distributing -dev quickstarts since no longer using SVN.
UP-4117 Correct documentation of uPortal log filename.
UP-4118 Add instruction on submitting security defect reports.
UP-4119 Note bugs-affecting-version search is on release wiki page.
Merge pull request #330 from apetro/fixes_from_4-0-13-1

Trivial documentation fixes from 4.0.13.1