Fix the bootstrap servers test
Merge pull request #293 from whirm/bootstrap_test_fix

Fix the bootstrap servers test
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Merge pull request #295 from NielsZeilemaker/discoveryv1.3

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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