Removed assert
Merge pull request #291 from NielsZeilemaker/discoveryv1.3

Removed assert
Sorting possibles by timestamp if they have the same overlap, sorting
possible randomly if they have the same overlap while replying, limiting
to max_tbs to maintain connections to.
Returning randomly doesnt work, need to sort randomly
Merge pull request #292 from NielsZeilemaker/discoveryv1.3

Improved sorting in 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
fix rebase problems
some fix
use dispersy.send_packets() instead of endpoint.send()
some fix