Merge pull request #9 from cycocrew/master

Added Windows 8.1 detection
Performance optimizations:
- TJclMapScanner: Access to FSegments via binary search
- TJclMapScanner: Better CPU register usage in map file parser
Merge branch 'master' of https://github.com/project-jedi/jcl
XE5 cosmetic fixes
Upated StrToStrings and StrIToStrings procedures in JclStrings.pas to correctly handle empty strings at the end when AllowEmptyString = True