LevelDB version 1.11.0.
Merge branch 'next' into leveldb_update

Conflicts:
	src/vault
Merge branch 'next' into leveldb_update

Conflicts:
	src/drive
Fix for MSVC x64 builds.
Moved leveldb tests to Commonn and set to build if MaidsafeTesting is true.
Added boost dependency fix.
Update README
update to compile with libc++abi and clang
Merge pull request #107 from chandraprakash/next

Fixes Mac - level-db build issues.
Merge branch 'next' into leveldb_update
Changed LevelDB test folder name.
Couple of CMake-related bugfixes.
Added ability for c++abi linker flags if HAVE_LIBC++ABI is set
allow cryptest to use libc++abi
define _POSIX_PATH_MAX 256 if not defined (clang )
Merge branch 'next' of git://github.com/maidsafe/MaidSafe into libcxxabi_update
ignore unused command line args when compiling (affects clang libc++abi)
Merge branch 'next' into leveldb_update
Merge.
upgrade to cryptopp 5.6.2 (from message by Erick Lavoie, thanks for that).
Merge pull request #109 from dirvine/cryptopp_upgrade

upgrade to cryptopp 5.6.2 (from message by Erick Lavoie, thanks for that...