fix #1669 and return IO error

# Conflicts:
#	config.go

Fixed #1735 Return nil if config value does not exist or is empty

static file map race bug fixed

Update phone regexp

fix template  read-write lock race

增加178号段

Return nil if config value does not exist or is empty

fixed handle config issue

Need return empty []string  if config value is empty.

split `“”` ==> []string{}, Not []string{“”}

fix bug: session id undecoded when destroy and sesssion memory provider push wrong

This reverts commit 891016a0.

fix #1595

colorful console and go fmt

try to fix the little bug when calling Close or Flush in async mode

lock the templates map when goroutie update the map

Added slack