redo some of the transaction code, get conflicts and obsoletes partly working

now uses a bit array of to-be-installed/removed packages and uses that to
avoid needing to do either per-property searches or repeated merges. but it
really needs to have a bit array of properties too probably

checkpoint before starting on simplifying/cleaning up the existing
transaction code

#ifndef _RAZOR_INTERNAL_H_

#define _RAZOR_INTERNAL_H_

#define ALIGN(value, base) (((value) + (base - 1)) & ~((base) - 1))

/* Utility functions */

int razor_create_dir(const char *root, const char *path);

int razor_write(int fd, const void *data, size_t size);

#endif /* _RAZOR_INTERNAL_H_ */