Update version check file.
update sqlite to v3.7.15.1
update build and ext/Versions.txt
tag the 1.8.6 release.
Bump version number to 1.8.6
Update to svn 1.7.8.
switch to v110_xp platform toolset
update default.build.user.tmpl
build.txt: update wix version
Use CTraceToOutputDebugString() instead of the custom TRACE.
