Merge pull request #5 from PuckCh/master

Better support for utf-8 character names.
Update the color thesholds for the ilevel of the characters
Remove the 'MINIMUM_ILEVEL_FOR_UPGRADES' setting (no more upgrade in game)
Fix the display of the ilevel bars

Related to commit c3a76dd
Remove all mentions of item upgrades from the HTML page
Need to encode output of print sometime...

for example when running in a crontab job, as LANG can't be not
existing.