sqlite3_total_changes.
Add tests.
Prevent CPP callback functions from being GCed
remove some experimental stuff in prep for next release
add a net45 cppinterop unit test project to the main sln file for easy testing
Merge pull request #20 from bordoley/fix_cpp_callbacks

Prevent CPP callback functions from being GCed
update to SQLite 3.8.7.4
Merge branch 'master' of https://github.com/ericsink/SQLitePCL.raw
Merge pull request #16 from bordoley/sqlite3_total_changes

sqlite3_total_changes.
add total_changes to ugly db object.  chg test case to use ugly call instead of raw, not that it makes much difference in this very simple case.