[MIN] Minor rewritings
[MIN] IntList: convenience function added
[MIN] Minor rewritings
[MIN] Tests: test renamed
[MIN] Minor optimizations in utility classes.
[MOD] Storage: reuse deleted slots in heap file. #970
[ADD] Core, UPDINDEX: tests added
[FIX] Storage: only store used bytes in last block. #970
[MOD] Storage: reuse deleted slots in heap file. #970
[MIN] XQuery: error messages revised.
[FIX] Core: Use AUC for replace operations. #970
[MIN] Core, Replace command: info message fixed.
[MIN] Cleanups, Documentation.
[ADD] XQuery: optimize union and list exprs in paths
[FIX] XQuery: optimization bug fixed, tests added
[FIX] Storage: Delete existing keys. #970
[MOD] Storage: optimizations of updatable index structure
[MIN] XmlTokenBuilder simplified
[FIX] Storage, updating index: creating space for new IDs
[MIN] Cleanup