New strings added and corrected some old ones

Added the lines translated into spanish from 1 to 76 from the official English source (https://github.com/UniversalMediaServer/UniversalMediaServer/blob/master/src/main/resources/i18n/messages.properties).
Merge pull request #76 from AlfredoRamos/patch-1

Spanish translation (Thanks, Alfredo Ramos!)
Modified FFmpeg subs implementation
Enabled automatic updating on Windows to 2.6.1
Updated changelog
Try to make file prettifying more reliable
Improved file prettifying regex
Updated JRE to 7u21
Formatting
Updated changelog
Code improvement
Fixed audio sync when muxing DTS via FFmpeg
Updated changelog
Formatting
Use configuration variable
Merge branch 'master' of github.com:UniversalMediaServer/UniversalMediaServer into resume_fix
Merge branch 'resume_fix' of github.com:UniversalMediaServer/UniversalMediaServer into resume_fix