Minor Windows SDP Guide Updates:
* Removed refs to depot spec map trigger.
* Added more detail to install steps, e.g. for spec depot
indicating that Protections and Triggers tables should be
hidden, and simplifying instructions for those steps by
providing more details.
* Clarified the many steps, like creating a spec depot,
are optional.
* Changed default spec depot name from 'specs' to 'spec'
to match Linux version.
* Changed default Perforce depot name from 'Perforce' to
'PerforceSDP', as commonly there is a already client spec
named 'perforce'.
* Updated copyrights to 2019.
* Changed some refs for 'master' as an instance name;
should be '1'.