Fix typo.
Now templates/spanish/README.html uses utf-8.

Add label meta charset with utf-8.

Replaces "&oacute;" --> "ó"
Replaces "&aacute;" --> "á"
Replaces "&uacute;" --> "ú"
Replaces "&iacute;" --> "í"
Update translation: templates/spanish/README.html.
Merge pull request #247 from LuqueDaniel/master

Update Spanish translation.