Paul's CCB serialization fix
Merge pull request #36 from 28msec/fix-ccb-leak

Fixed varinfo leaks
Removed useless zstring_b.
Clean-up
Made constructor and op= private since they're not defined to prevent use.
Fixed alignment in Hashmap.
Fixed calls to non-objects in expr classes.
Merge branch 'gcc-4.9' of https://github.com/28msec/zorba into gcc-4.9