Correct potential deadlock in ClientStorage:tpc_begin by being sure to release locks in a finally block.
Update to latest v1 bootstrap
Updated Travis YAML.
Merge pull request #1 from NextThought/master

ClientStorage.py can deadlock in tpc_begin
Ignore derived.
Include blob filename in exception.

Match ZODB commit 69c18075dafca12a7bb4d431751d40c2f0f2884e.
Merge from master.