CRAN Taskview: Update needed

[HenrikBengtsson]

https://cran.r-project.org/web/views/HighPerformanceComputing.html has:

• "The BatchJobs package provides Map, Reduce and Filter variants to manage R jobs and their results on batch computing systems like PBS/Torque, LSF and Sun Grid Engine. Multicore and SSH systems are also supported. The BatchExperiments package extends it with an abstraction layer for running statistical experiments. Package batchtools is a successor / extension to both."

I think it would be worth giving batchtools a more prominent front here and move BatchJobs to the backseat.