api change: py: convert Advisory, AdvisoryRef and AdvisoryPkg attributes to Unicode.
Support package splitting via obsoletes. (RhBug:1107973)
packaging: bump the SONAME as there are dropped API calls.

Also see 01029b9.
build: 0.4.19
cosmetic: replaced fail_unless with ck_assert_int_eq
sack: using pool->considered instead of SOLVER_LOCK for excludes (RhBug:1099342)
sack: include directive support added (Related:RhBug:1055910)
New version: 0.5.0
build: 0.5.0-1
goal: does not raise exception on empty selector (Related:RhBug:1127206)
cosmetic: removed unneeded semicolon
added sha512 support (RhBug:1082658)
Fix pool_split_evr's handling of EVRs without releases.

Typically, advisories may have EVRs like "1.4".