Support for Non-ASCII characters

[nicolas-miari]

The ./configure script works great, but I had to change the author name from the usual "Nicolás Miari" to "Nicolas Miari" (no diactritics) to get it to work, otherwise it would fail with:

Traceback (most recent call last):
	8: from ./configure:107:in `<main>'
	7: from ./configure:13:in `replace_variables_in_files'
	6: from ./configure:13:in `glob'
	5: from ./configure:17:in `block in replace_variables_in_files'
	4: from ./configure:17:in `open'
	3: from ./configure:19:in `block (2 levels) in replace_variables_in_files'
	2: from ./configure:19:in `each'
	1: from ./configure:20:in `block (3 levels) in replace_variables_in_files'
./configure:20:in `gsub!': incompatible character encodings: ASCII-8BIT and UTF-8 (Encoding::CompatibilityError)

I guess I can go back to the generate files and fix it, but it would be nice to have.