fixed #144 #145

Implemented three new flags in the application.conf file:
#disable this if you don't want memory informations when the /admin/dbStatistics API is called
baasbox.statistics.system.memory=true
#disable this if you don't want OS informations when the /admin/dbStatistics API is called
baasbox.statistics.system.os=true
#enable/disable the access log
baasbox.server.accesslog=true