loading servername & uploadURL at the start of the plugin so that it
doesn't have hdd reads every minute

changed the updateFrequency from 60s to 100s to be in sync with UnixTime
bugfix where servername was a string instead of a variable
BloodStats no longer compares playersOnline to currentPlayers online to
determine wheter to update stats. This change is because there's a
problem when one server has a change in playerCount and creates a
database entry and the other server still has the same amount of players
and so doesn't update the entry with its count. E.g. we have holes in
the statistics.

Now we only check wheter the playercount is larger then 0, if so we
create/update an entry otherwise we ignore it and check after the 100s
interval passes again.
Merge branch 'master' of https://github.com/aerobless/BloodStats.git
Bugfix: Added sentinel to make sure that stats are updated once more if
all players leave at once.