Notify about the DiffBrowser{Did,Will}ReloadDiffs observer from Gitorious.DiffBrowser
Notify about the DiffBrowser{Did,Will}ReloadDiffs observer from Gitorious.DiffBrowser

Also extract further DiffBrowser related callbacks out into observers

grjones/gitorious-submodule-dependencies,rae/gitorious-mainline,rae/gitorious-mainline,spencerwp/mainline,vymiheev/Gitorious-OpenStack,altrair/gitorious-openstack,gitorious/mainline,balcom/gitorious,Gitorious-backup/base_uri-fixes,rae/gitorious-mainline,adg29/asi.gitorious,elcom/gitorious,Gitorious-backup/base_uri-fixes,gnufied/gitorious,tigefa4u/gitorious-mainline,grjones/gitorious-submodule-dependencies,elcom/gitorious,crazycode/gitorious,victori/gitorious-jruby,grjones/gitorious-submodule-dependencies,SamuelMoraesF/Gitorious,Gitorious-backup/yousource,ericbutters/eric-gitorious,deld/gitorious,ericbutters/eric-gitorious,adg29/asi.gitorious,Gitorious-backup/yousource-features,ericbutters/eric-gitorious,vymiheev/Gitorious-OpenStack,victori/gitorious-jruby,deld/gitorious,gnufied/gitorious,njall/wel-gitorious,Gitorious-backup/yousource-features,cynipe/gitorious,Gitorious-backup/yousource,gitorious/mainline,Gitorious-backup/vsr-mainline,Gitorious-backup/base_uri-fixes,cynipe/gitorious,gitorious/mainline,Gitorious-backup/mainline,gnufied/gitorious,altrair/gitorious-openstack,Gitorious-backup/mainline,elcom/gitorious,water/mainline,rae/gitorious-mainline,crazycode/gitorious,spencerwp/mainline,tigefa4u/gitorious-mainline,victori/gitorious-jruby,feniix/gitorious,Gitorious-backup/yousource-features,SamuelMoraesF/Gitorious,Gitorious-backup/base_uri-fixes,SamuelMoraesF/Gitorious,crazycode/gitorious,gitorious/mainline,feniix/gitorious,spencerwp/mainline,Gitorious-backup/franklin-devs-phpbbhub,balcom/gitorious,Gitorious-backup/franklin-devs-phpbbhub,Gitorious-backup/yousource,tigefa4u/gitorious-mainline,altrair/gitorious-openstack,Gitorious-backup/mainline,Gitorious-backup/yousource,water/mainline,vymiheev/Gitorious-OpenStack,njall/wel-gitorious,feniix/gitorious,spencerwp/mainline,balcom/gitorious,Gitorious-backup/franklin-devs-phpbbhub,SamuelMoraesF/Gitorious,water/mainline,cynipe/gitorious,Gitorious-backup/vsr-mainline,Gitorious-backup/franklin-devs-phpbbhub,Gitorious-backup/mainline,adg29/asi.gitorious,Gitorious-backup/vsr-mainline,Gitorious-backup/yousource-features,njall/wel-gitorious,elcom/gitorious,Gitorious-backup/vsr-mainline,tigefa4u/gitorious-mainline,adg29/asi.gitorious,deld/gitorious