New version: 0.4.3
build: 0.4.3-1
iutil: running_kernel().
tests: dump_packagelist() can free the list too.
refactor: goal: reinit_solver()
refactor: concentrate all libsolv solver initialization into the static solve().

decisions about when to disable installonly etc. can easily take place there.
iutil.c: dump_solvables_queue.

Useful when debugging installonlies.
Limit the number of installed installonlies. (RhBug:880524)

apichange: hy_sack_set_installonly now takes a new parameter: the limit on the
number of present installonlies.

The implementation emulates exactly what yum does: look at all the *provides* of
the designated installonly strings, but limit the number of packages *per the
package name* basis.
goal: when sorting the installonly candidates, consider the running kernel.

Sack gets a hook to override testing the running kernel, useful in unit tests.
installonlines: python bindings for installonly_limit.

apichange: This coincidentally reverts the API change of a28f8f1. It is more
convenient to set the installonly provide names and the limit separately after
all.

Related: RhBug:880524
tests: shave some lines off test_goal.c by using smarter Goal results assertion.
tests: slim test_goal.c by using a testsys function instead of its reimplementation.
adapt to libsolv 3b3dd72: obsoleting by an installonly package is erasing.
speedup fetching rpmdb a bit by reusing what we can from the old cache.

Suggested by mls, thank you!
With the current libsolv there's no need to reinit solver for re-resolving.

pointed out by mls.
New version: 0.4.4
build: 0.4.4-1
py: subject: sack._knows doesn't need to take sack.

Got self already.
subject: globbing for sack._knows.

Warrants some refactoring in sack.c.
subject: yield correct results when globbing over a version.