Merge pull request #80 from mwjackson/master

made Site/AppPool/Application idempotent'ish (more or less)
Merge pull request #81 from mwjackson/master

potential solution to #73
XML docs for the MSBuild helper improved
New MSBuild helper with lot's of defaults
New MSBuild helper with lot's of defaults
Merge branch 'master' of github.com:fsharp/FAKE
Revert "assume second argument is "Target" if no key=value supplied"

This reverts commit 7ca79e5e17b730d91a14518be1d8ffca46350d26.
Wron projects in solution
can run appcmd.exe and unlock configSections