Updated LevelDB to v1.15
Fixed compiler error in LevelDB with GCC.
Moved third party tests from Common to their own CMakeLists.txt.
Fixed Clang compiler error in LevelDB.
Update README.md
Update README.md
Trivial changes for linux compile flags
remove unrequired flag
Altered compile flag for clang
Merge branch 'next' of github.com:maidsafe/MaidSafe into next
Fixed bug in CMake utility function.
Merge branch 'next' of github.com:maidsafe/MaidSafe into next
Added OS X 10.9 to list of supported target platforms in CMake file.
Merge branch 'next'
Updated submodule references.