alpha-6.1 : configuration improvements

Alpha-6.1 is out, marking the beginning of what I hope will be some 
great improvements on the configuration scripts.

Changes for this version include:
- Most user messages have been moved to text files
- A new dialog-based configuration script has been added
- configuration-wrapper.sh was created. If dialog is detected the new 
script is started, otherwise the old one is used instead.

TODO:
- Take advantage of the file based messages for I18n
- Create an X based configurator
- Test all three configurators and close this part of the package so we 
can move along

Estimated timeframe for this work: two weeks.

As usual, testing is more than welcome and should now be focused on 
setup_replication.sh an configuration-wrapper.sh.

Kind regards,
Fernando.

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