Start to move common functions (maketemp) to lib/tools, and better use autotools for lib/{easydialog,tools}.

 Delete handlers/easydialog.sh since it's now in lib/.

 Moved easydialog.sh to lib/ directory: more code is going to be shared, let's start here.

 rdiff.helper: (re)rename do_rdiff_conn function to do_rdiff_ssh_con, since the previous rename was not the good one.

 rdiff.helper: rename do_ssh_con function to do_rdiff_conn, in order not to pollute namespace... and allow future code factorization :)

 easydialog: add optional third argument to booleanBox, to set default no if needed (and actually needed by the upcoming dup.helper).

 Fix formDisplay to reset $REPLY as it should.

 Fix listBegin/listItem/listDisplay to work with checklist boxes, as advertized.

 Fix documentation for get_next_filename function

 Fix: the "Cancel" buttons used to have a weird behaviour... at least

 Fix ChangeLog entry.

 Fix: used to expand '*' in default source directories

 Added my email address to AUTHORS file

said error was orange and fatal was red, maybe this is better?

Also fixed a bug in the rdiff handler that caused a unary operation error if
the variable wasn't fixed