Updated target API.
Foxcon InFocus is not supported.
Added Spanish translation (thanks to ozcho).
Updated Android support library (revision 21).
Added replace/append/cancel dialog to key file editor.
Bugfix: Disable write dump option in editor if NFC is disabled.
Updated lint config due to the new language.
Refactored the Spanish translation file.

Try to match a line length of 80 characters.
Fixed typo.
Added bare bone of Mifare Classic diff utility class.
Implemented first diff function for dumps.

(Not tested.)
Implemented second diff function for dumps.

(Not tested.)
Finished documentation of the diff ultis class.
Added bare bone of "Diff Tool"