Build separate 64-bit executable

Untested on Windows or Linux (so far)
Log warning message for 64-bit host
Indenting
Fix some compiler warnings
When fetching time, host should return pointer

Host should NOT write a pointer to the data object, the plugin won't care
about that. Sadly this still does not fix the problems with the independence
plugin.
Avoid crash when test suite exits
Fix some more memory leaks