Released gnet v1.3.0

#Features

• Determine logging mode by environment variable 2a7977
• Support locking each I/O event-loop goroutine to an OS thread 6fd641

#Enhancements

• Improve the implementation of Least-Connections load-balancing b6a5f5
• Speed up the Least-Connections load-balancing b5fbbd
• Leverage system calls instead of net package to create listeners ccc8c6
• Refine the logging module f46da4
• Reorg errors in gnet 1c2f4b
• Move logging module into internal package 00af50
• Take off the codec from eventloop bc85c3
• Refactor for buffer in Conn 455c5a
• Refactor the load-balancing algorithm of source addr hash abbf58
• Make channel buffered if necessary 43f93c

#Bugfixes

• Fix a bug that led to negative counter of sync.WaitGroup on Windows 16ed4a
• Add "windows" build tag under SO_REUSEPORT mode 7862f3
• Supplement all the formal protocol formats of TCP and UDP 258253
• Resolve the issue of closing one fd twice b5a5c7
• Fix concurrent loopCloseConn causes panic #111
• Eliminate duplicate calls to loopCloseConn a72f5f

#Docs

• Add a customized codec example #90
• Add placeholder for user cases and new relevant article 5197f1
• Renew results of techempower benchmark 61eee8
• Add the list of donors 42e04d
• Add xs:code 33a3e5
• Build an official website for gnet 49363c
• Move the majority of content to website and simplify READMEs 903ff8

#Misc

• Fix a typo and improve code comments 37d75c
• Use SyscallError to wrap system calls errors c3907e
• Refine go build tags of operating systems 637144
• Format copyright info 6872c2
• Remove all examples from the source-code repo a704e0
• refine the usage of os.NewSyscallError 2d54d8