inputs: support to specify file ignorelists

[fho]

Support to specify patterns for matching files that are removed from the list of tracked files. Often it is the easiest to specify that all files in an application directory should be tracked. Supporting ignorelists would made it simple to filter out some files that should not be tracked, like e.g. READMEs. This is often easier then having to specify explicitly patterns for every file that should be tracked.