Update README.md

change "concept" to "principle"
Merge branch 'master' of github.com:flashsword20/blackhole
bean injection null pointer fix
remove useless files
add monitor named 'wife says'
move the monitor package to another project "wifesays" https://github.com/flashsword20/wifesays
clean project
add bin
add dns forward mechanism, when external dns is configured, blackhole will lookip it for records if it can't intercept the request for local zones
bugfix for wifesays
forward query of unsupported type to external dns
manual
add manual
readme
readme
readme
benchmark
update benchmark
readme
change package structure