changed length of object_id to support 64 instead of 32 characters (e.g. for name tables)
created search index for ext_log_entries to include object_id, object_class and version (speed increase >1000% for typical max(version) query)
support NOTIFY change tracking policy in Sluggable
Merge pull request #632 from lukey78/master

[Loggable] introduce a combined search index for ext_log_entries to increase performance
travis has mongodb installed
Merge pull request #636 from lenar/patch-2

support NOTIFY change tracking policy in Sluggable
try fixing mongo extension requirement another way