update dispersy pointer
adapt communities to dispersy per-class logger + pep8 fixes
Merge pull request #722 from LipuFei/fix_community_logger

Fix community logger
Add global statistics
Add stats request/response
Add stats handlers to TunnelCommunity
Include community uptime in stats response
Added crawler option to main.py
Add JSONP api to crawler
Log public key in hex
Crawls stats fix
Fix incorrect stats
Added more statistics to crawler output
Only process stats requests from authorized crawlers
Improve stats conversion
logging fixes