recover or share links in wiki

Hi @JuniusLuo 

Just discovered that there're some links in the wiki which do not exist anymore, like the diagrams from [Service Scheduling Flow](https://github.com/jazzl0ver/firecamp/tree/master/docs/workflows#service-scheduling-flow). Is there a chance to recover them or just send it to me, so I could update my fork of your great project (https://github.com/jazzl0ver/firecamp)?
