Merge pull request #177 from Heather/develop

Correct build files for mono / *nix systems
Putting the release notes into a ReleaseNotesHelper - relates to issue #171
API docs for MSBuild
API docs for TeamCityHelper
Fixing link in ReleaseNotes helper docs
MSBuild API docs
Release Notes API docs
MSBuild API docs
Merge pull request #178 from Heather/develop

GenerateDocs currently fails on Linux
API docs for FxCop
Links between FxCop API tasks and tutorial.
API docs for FileUtils