Can subset.spiketimes by channels even when some (other) channels are repeated

* also add
test for new subset.spiketimes functionality
Update rstudio project file
Merge branch 'feature/subsetbychans' into develop

* feature/subsetbychans:
  Update rstudio project file
  test for new subset.spiketimes functionality
  Can subset.spiketimes by channels even when some (other) channels are repeated
Prepare 0.7-1 release
Merge branch 'release/0.7-1' into develop

* release/0.7-1:
  Prepare 0.7-1 release