Merge pull request #68 from sneumann/master

Please pull these fixes, which enable peak list input, and bump version to 1.5.2
Fix electronic noise removal in workflow
Merge remote-tracking branch 'origin/HEAD'
Update RMassBankXCMS.Rnw

Fixed minor errors, reordered 3.3 and 3.4 to avoid confusion, mentioned msmsRead.
fix a merge conflict (version number and line break in vignette)
check the supplied mode and complain if not matched, and added mM. Closes #81