Added simple build system for fritomod
Ignore a working file
WoW.AssertFrame optionally supports a reason
Added Serializers.*AllPoints, for convenience
Fix a couple lingering bugs in Frame-Layout's SetPoint
minor debug
Persistence reworking

Most of these changes were made to prepare Persistence to be used
outside of WoW. While I was here, I also cleaned up a bit of the code
(e.g. adding aliases, improving variable names). The underlying behavior
should be the same.
Frames.Position improvements

There's two changes here:

First, Frames.Position supports an optional defaultPosition function
that will be used if no saved position is available. I wasn't sure how
to implement this previously, so it's nice to have a solution now.

Second, all points are now saved, instead of just the first point. I
tried to find why I only saved the first point, but I couldn't find any
reason for it.