Resolve "Separate option for mcPaths TreeName"

Release notes

Improved consistency for specifying treeNames to be used for input files: they can now be specified in the initialize master/campaign configs as (parentheses giving alternative name segments) mc(data)Paths(FileLists)TreeName , mc(data)TreeName or simply treeName. The more specific/longer named tags take precedence over the more general/shorter tags. All of the overwrite a potential suffix of the form path/to/samples:treeNameSuffix if applicable to the respective case

Details

Closes #249 (closed)