fix get_str() in packagedelta-py
fix pycomp_get_string(), pycomp_get_string_from_unicode()

Actually dereference the pointer passed. Fix prototype and all users.
get_delta_from_evr(): create the python object only when delta exists
remove: packageDelta_new
New version: 0.4.6
build: 0.4.6-1
Do not crash when querying provides that do not exist

hy_reldep_create() returns NULL if nothing provides the name, so only add it to
the reldeplist if it's going to exist.
Fix malfunction of Package.__lt__ and Package.__gt__ (RhBug:1014963)
New version: 0.4.7
build: 0.4.7-1
fix: latest_per_arch on incompatible arches. (RhBug:1049226)

Patch by mls, thank you!
Subject written in C
implemented iter above Nevra class
reldep_possibilities_real is a generator
moved NEVRA.to_query method to C
subject methods returns python NEVRA object
subject: regex compiled when needed