Previously, there were many indentation styles in use: Real tabs, 2, 3
or 4 spaces, mixing these within the same file, function or even within
a single line.
This commit changes all bash scripts in the handlers, src and lib dirs
to use consistent indentation: three spaces are now used everywhere.
Other files (e.g. Makefiles) are left untouched.
Additionally, this commit removes all trailing whitespace.
- general cleanup of dup handler
- support remove-older-than command
- also run "duplicity cleanup" before anything else, for safety reasons
- migrated full/incremental backup switch to new syntax
ChangeLog: removed trailing space
