Update Mock help to reflect ModuleName parameter
Fully-qualified commands

Fixes #73

Several calls to built-in PowerShell commands are now module-qualified, making Pester behave properly internally, even if the caller has mocked these commands.
Merge branch 'dlwyatt-MockSafety'
Enable latest strict mode when running all tests

Pester.bat is used locally to test the whole suite in clean environment
and on server to integrate with Team City. This way we can make sure the
module is kept strict mode compatible.
marking the 2.1.0 release