add v7.1.6 core dlls
minior updates to core interfaces
installed autofac, added IoC to ApplicationEventHandler
built generic uow and repository pattern
installed autofacWebApi addon, fixed ContentTree issue
updated contactVM, added spamTimer and spamPot attribute ext, updated htmlHelperExt
fixed form spam protection timestamp, honeypot validation
project re-organizing, backoffice contentTree still having issues with Autofac
upgraded to v7.1.8
Finish v0.0.2_v7.1.8_upgrade