Update coding style and add .clang-format
Automatically format addrman.h
Automatically format alert.h
Automatically format allocators.h
Automatically format base58.h
Automatically format bloom.h
Automatically format chainparamsbase.h
Automatically format chainparams.h
Automatically format checkpoints.h
Automatically format checkqueue.h
Automatically format clientversion.h
Automatically format coincontrol.h
Automatically format coins.h
Automatically format compat.h
Automatically format core.h
Automatically format crypter.h
Automatically format db.h
Automatically format hash.h
Automatically format init.h
Automatically format key.h