Merge pull request #74 from dimitarp/master

[FIX] HTTP: fixed NPE when reading a config file
[Core, Locking]: Enable database locking for RestXQ
Merge pull request #75 from JensErat/visitor-locking

[Core, Locking]: Enable database locking in RestXQ
[MOD] RESTXQ: database locking support
[FIX] XQuery, QT3TS: Serialization tests
[FIX] RESTXQ, #688: double call of update operations
[MOD] Adapted RESTXQ to refactorings in main project.
Merge pull request #76 from LeoWoerteler/static-decls

[MOD] Adapted RESTXQ to refactorings in main project.
[FIX] RESTXQ: revert to global locking
[MOD] RESTXQ: return complete error stack trace
[FIX] XQuery, GH-690: Added test for RestXQ.
Merge pull request #77 from LeoWoerteler/gh-690

[FIX] XQuery, GH-690: Added test for RestXQ.
[FIX] HTTP services: catch flawed query parameters
[FIX] Geo Module: namespace declaration added to results