Updated the copyright year.
Improved performance when calling math functions.
Fixed missing newline.
Updates some information in the manual.
Fixed missing std:: in stringutility.
Made Bang fields which should be constant constant.
Removed VS 2012 files, as it is no longer supported.
Bangs are now stored in an unordered_map rather than a map, for faster access.
The settings API now uses unordered maps rather than ordered ones.
Removed unused parameter to BangManager::AddBangCommand.
Changed the settings file reading mode to utf-8.
Updated the docs.