[FIX] XQuery Update: removing buggy memory-saving optimization
[FIX] XQuery, JSON Serializer, output of element names. Closes #614
[ADD] Core, Locking: Lock Downgrading support in DBLocking
[MIN] Fixed rare deadlock in locking test code
[FIX] Core, Locking: Fuzzy testing and fixed deadlock
Merge branch 'master' of git://github.com/BaseXdb/basex into locking