Major changes in 0.1.2:
* Fix build on solaris / OSX
* Leak fixes
* Fix typo in APIs: availible -> available
* We now handle the case where a GVfs implementation
  fails to initialize. For instance gvfs fails if
  there is no session bus.
* g_memory_output_stream_set_free_on_close was renamed
  to g_memory_output_stream_set_free_data and frees
  on finalize, not close. This makes more sense and
  is more consistent with GMemoryInputStream.
* Remove c++ keywords from public header files
* Clean up warnings in code
* Keep around async i/o worker threads a bit longer
  than the previous 0.5 secs

