Update Spanish (es, es-PA) for the latest changes r14352.

PD: Can someone change the Category of this issue to *Translation*? Thank you
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Do you intend to change csv separators on *only* es-PA.yml?

<pre><code class="diff">
=== (+3,-3) config/locales/es-PA.yml ===
@@ -339,9 +339,9 @@
field_user: Usuario
field_value: Valor
field_version: Versión
- general_csv_decimal_separator: ','
+ general_csv_decimal_separator: '.'
general_csv_encoding: ISO-8859-15
- general_csv_separator: ';'
+ general_csv_separator: ','
general_pdf_fontname: freesans
general_first_day_of_week: '1'
general_lang_name: 'Spanish/Panama (Español/Panamá)'

</code></pre>
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Sorry forgot about that change. I should have created another patch for that.
I changed that because on Windows Spanish/Panama is set with those *separator*.
I realized that when I opened a generated csv file from redmine with es-PA.
Excel did not show the separations correctly (Windows with Spanish/Panama).
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Committed in trunk and 3.1-stable, thanks.
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