Merge pull request #1 from FunPlus/master

readme updated
handle invalid log line
sendmail in case of crash
change dau color
color
change color
kernal msg beep
threshold updated
memcache timeout
trap TERM signal to cleanup
log fatal err info
lint and vet
move debug statement
HUP shutdown gracefully
resilient to invalid log line
tracking abnormal change
LRU todo
use md5 to save history data memory
each parser can config abormal percent value
rename var