Fixed error introduced in rm_double_paths (didn't handle start or end of list properly)
Extended sort criteria of rm_double_paths to do secondary sort by dev and then by basename, to improve detection of hardlinks.
Added option -H to also search for hardlinked dupes (default ignore).
Note that due to bind mount issue, hardlinks with same basename are still ignored regardless of this setting.
Merge branch 'devel' of https://github.com/SeeSpotRun/rmlint into develop
Reformatted the source code (astyle --style=google $(find src -iname "*.[ch]")