Removed bootstrapcandidates from fast walker
Merge pull request #285 from NielsZeilemaker/fast_walker_fixup

Removed bootstrapcandidates from fast walker
Fix logging call
Merge pull request #286 from whirm/twisted-callback

Fix logging call
Small fix for main
Shuffle my_preferences
Periodically add bootstrap candidates to communities
Forgot to add insert_trackers to _pending_tasks
Merge pull request #287 from egbertbouman/discoveryV2

Small improvements for DiscoveryCommunity
new_community callback for discovery community
Merge pull request #288 from NielsZeilemaker/discoveryv1.2

new_community callback for discovery community
remove walk_advice* statistics
remove walk_bootstrap* statistics
change some statistics to properties
remove WalkStatistics
fix rebase bug
change for optimize mode
simplify endpoint statistics
some cleanup
some fix for tribler