- change solv format in an incompatible way, breaking compatibility

- change solv format in an incompatible way, breaking compatibility
  to all older versions. sorry.
  * new fastlz from Matz
  * maxsize/allsize data for faster reading
  * types are stored as Id to make extensions possible
  * new type CONSTANTID
  * new file repopack.h
  * kill unused vertical/packedsizes flags
- switch to pread for paging so that we don't have to mess with file
  offsets
- define more standard IDs
- add new solver_calc_installsizechange() function
- add repo_add_rpms() function
- change location storage method a bit, now VOID means ommited
  (adapt zypp code, please)
- re-added support for source rpm name to susetags parser