Umoria 5.7.10

Bug Fixes

• xor_byte decryption was not being performed correctly while reading score.dat files.
  Introduced with commit: 676cdfe (readHighScore() function).
  Note: game.sav files were not affected by this bug.

Code

• Delete constant.h, moving many constants into config.h and the rest into
  their related headers. Things are looking pretty ugly at the moment but
  perhaps it's a better starting point for further refactoring.
• Change config.h to namespace'd constants - perhaps not a good approach but let's see!