Fix build failed problem

pngcrush SourceForge folder structure has been changed
Trim pngcrush version number
Trim empty lines
Merge pull request #52 from yeahdongcn/master

Fix build error
Normalized strings
IB magic numbers
Updated translations
JPEG and PNG quality setting
Added pngquant
Hack to ensure pngquant is not run twice on same file
Switched PrefsController to use Base locale XIB
Use 60%-100% quality range
Target 10.8
Converted standard-layout MainMenu XIBs to Base i18n
Switched MainMenu to autolayout
Shoddy i18n for Quality tab
Work around AutoLayout bug