Re #7355 Turn remote jobs flag ON
Move Framework dependent build options in main CMakeLists file

In its old place it only worked when set by the command line. If not set
then the Framework sub-directory didn't see the flag and didn't create
the Remote/RemoteAlgorithms targets meaning that MantidPlot was linking
to a non-existant library.
Refs #7355
Fix windows linkage issues. Refs #7355
Merge remote-tracking branch 'origin/feature/7355_remote_jobs_on'