Use finally to make sure to close connection even if an exception
occurs.
Reappearance of typo corrected.
Implemented basic XQJ based CRUD. Refactored application.conf not to
contain sensitive hyperbird data. These data are now included into a
separate hyperbird.conf file not commited to github (added
conf/hyperbird.conf to .gitignore). An example file without sensitive
data is found in conf folder and named hyperbird.conf.example.