Unify indentation in tcl file to always be 4 spaces.
Unify indentation in tcl file to always be 4 spaces.

There was a mix of space and tab which looked different in the
editor depending on tab-width settings.
Add (emacs-) editor settings for the editor to automatically
pick up the rules.

While at it: remove trailing whitespaces.

Fixes #195

Signed-off-by: Henner Zeller <259ad50fabbfd39355f36ecd6c0afca541ea66ef@acm.org>

chipsalliance/UHDM,chipsalliance/UHDM,chipsalliance/UHDM