- Added libsolv support to KIWISatSolver
  The class supports libsatsolver and libsolv, if libsolv is present
  it is preferred because it's the successor of libsatsolver
- Fixed spec file, clicfs is not a requirement
- Fixed spec file, squashfs exists on all supported versions
  no suse_version check needed anymore
- Fixed spec file, db45-utils should be a generic recommendation
- Fixed spec file, the perl requirement should not be strictly
  set on a specific perl version, >= the distro version is more
  accurate
- Fixed spec, starting with openSUSE 12.1 libsolv is used
- Fixed spec file, cleanup obsolete build requires
- Fixed spec file, cleanup and update package descriptions
- make sure /var/cache/kiwi/satsolver exists when running a
  solver job