Fix a bug preventning seeing nearby sims, or TPing to other sims.

After some investigation, McCabe and I narrowed it down to this if statement.
We still don't know why, but at least it fixes the problem.  To be investiganted more later.
Fixes http://redmine.kokuaviewer.org/issues/354

I similar fix should be applied to Gemini and Dark, but that should wait for the decision to move artwork into the repo.
Fixes http://redmine.kokuaviewer.org/issues/1000 and remove some related left over cruft.
Merge the artwork and font "prebuilt" packages into the source repo, as discussed on IRC and the mailing list, and remove some SL logos.

I know, there are two slightly different LICENSE-logos.txt files.
One that was originally in the source repo, one that was from the artwork package.
I'm a coder, not a lawyer, and not the owner of those copyrights, so left them as is.
Fixes http://redmine.kokuaviewer.org/issues/1124 and makes sure there are no other ways to side step the SecondLife grid checks.
Fixes http://redmine.kokuaviewer.org/issues/585
Just adding a TODO.
Fix http://redmine.kokuaviewer.org/issues/1126 and as a bonus, now using blowfish to encrypt passwords.
Apply various Mac build patches from Mimika Oh and Nemurimasu Neiro to fix up http://redmine.kokuaviewer.org/issues/598 and http://redmine.kokuaviewer.org/issues/602
Fix up the missing default colour.
Remove a duplicate return statement.  Thanks to Nicky Perian for pointing this out.
Let it build under gcc 4.5.2.  Thanks to Lord Drakeo for fixing this.
Removing ancient, left over, broken and never used, hippo update code.
Just some whitespace cleanup, coz my editor insists, coz I told it to insist.
Comment answering a question in a previous comment.
Remove some left over WindLight cruft.
More automated whitespace fixes.
Refactor all those little checks to see if a notecard is a WindLight setting card.
More automated whitespace cleanups.
Merge a bunch of duplicated Windlight sharing code.