Completed dropbox sync

Moved prop stuff to own folder, let dropbox fully sync and deleted
unnecessary files
Added data logs back
Moved old files around

moved old files, added XPlaneImport
commit before code rewrite

commit after fighting units for a while and going to begin a new code
rewrite
EOB

commit at the end of the day
half day commit

commit after working for half a day. having problems with accelerometer
norms not matching. If switch signs on W and Gloadnorml, results are
close. Might be a left handed coordinate system.
last commit of XPLANE-Code-rewrite branch
attempt 2