Add translation file for Spanish

Also, update Makefiles and translations list.
Merge pull request #93 from danirod/bugfix-mmx

Explicitly enable MMX instructions in FastScaler.
Check MMX instruction support too (for consistency).
Update README.md
Merge pull request #99 from axet/master

Added cmake to debian dependencies
Cleaned up README file (from axet-master).
Updated automake and changed default log file name.
Use timestamps instead of a counter to get unique filenames.
Turn sound notifications off by default.
Only use _mm_stream_si64 in GCC >= 4.8.
Corrected typo in README.
Fix simple-uninstall so it works on 32-bit.
Move SSSE3 code to a separate library, this should hopefully fix some of the compilation issues in older GCC versions (32-bit).
Add GCC version number to version info.
Fix overflow in scaling algorithm.
Add comment about the need to set the keyframe flag.
Update Spanish translation file
Merge branch 'feat-translation-es'