Minor changes:
* Reformat the bodies of the iterator interface routines in IteratorWrapper to
  make them a bit easier to read
* Switched the default in the leveldb makefile to be optimized mode, rather
  than debug mode
* Fix build problem in chromium port

git-svn-id: https://leveldb.googlecode.com/svn/trunk@30 62dab493-f737-651d-591e-8d6aee1b9529

* Patch LevelDB to build for OSX and iOS
* Fix race condition in memtable iterator deletion.
* Other small fixes.

git-svn-id: https://leveldb.googlecode.com/svn/trunk@29 62dab493-f737-651d-591e-8d6aee1b9529

git-svn-id: https://leveldb.googlecode.com/svn/trunk@23 62dab493-f737-651d-591e-8d6aee1b9529

git-svn-id: https://leveldb.googlecode.com/svn/trunk@21 62dab493-f737-651d-591e-8d6aee1b9529

git-svn-id: https://leveldb.googlecode.com/svn/trunk@20 62dab493-f737-651d-591e-8d6aee1b9529

git-svn-id: https://leveldb.googlecode.com/svn/trunk@2 62dab493-f737-651d-591e-8d6aee1b9529