Remove unused stuff
Remove unused flag (MONGO_CURSOR) and multi-declaration of mongo_cursor_free_le
We don't do threading: Killing unused code
Got no idea where this came from, but its not used
Kill the Cursor right away, rather then going down complex checks
Remove cursor tracking leftovers since 1.2

Cursors used to be thread-safe and almost-persistent
None of this logic is needed anymore
Remove unused struct

Cursors now register a callback on the connection, so when it is closed
(for any reason) we kill the cursors associated with that connection.
The cursors are also automatically killed during object dtor
Remove dead code
More unused weirdness
Lift MAKE_COPY_ZVAL from php-src rather then use our homebrewed version

It is defined in 5.3, just need it for 5.2 support
More unused stuff
Merge pull request #560 from bjori/PHP-soup-cleanup

Spring cleaning

* bjori/PHP-soup-cleanup:
  More unused stuff
  Lift MAKE_COPY_ZVAL from php-src rather then use our homebrewed version
  More unused weirdness
  Remove dead code
  Remove unused struct
  Remove cursor tracking leftovers since 1.2
  Kill the Cursor right away, rather then going down complex checks
  Got no idea where this came from, but its not used
  We don't do threading: Killing unused code
  Remove unused flag (MONGO_CURSOR) and multi-declaration of mongo_cursor_free_le
  Remove unused stuff