- update to 1.18:
+ Replace the basic fprintf call with a call to fwrite
+ Fix ALL the header guards.
+ A new CONTRIBUTING file.
+ leveldb: Remove unused function 'ConsumeChar'.
+ leveldbutil: Remove unused member variables from WriteBatchItemPrinter.
+ Verify checksums of index/meta/filter blocks when paranoid_checks set.
+ Invoke all tools for iOS with xcrun. (This was causing problems with the new XCode 5.1.1 image on pulse.)
+ include only once, and fix the following linter warning: "Found C system header after C++ system header"
+ When encountering a corrupted table file, return Status::Corruption instead of Status::InvalidArgument.
+ Support cygwin as build platform, patch is from https://code.google.com/p/leveldb/issues/detail?id=188
+ Fix typo, merge patch from https://code.google.com/p/leveldb/issues/detail?id=159
+ Fix typos and comments, and address the following two issues:
+ Add missing db synchronize after "fillseq" in the benchmark.
+ Removed unused variable in SeekRandom: value (issue #201)