IMPL: proper implementatio nfor free
IMPL: enable GNU extensions
IMPL: more compliance
TRY: unpleme nupdate
Revert "TRY: unpleme nupdate"

This reverts commit 7c0be1c4c0f2de0003f8eaaad0a70c28dc32275b.
IMPL: make proplist a dumb linear structure

Looks like there is no ready to use optimized library around.
Will make something in future, go on so far
IMPL: pa_proplist_update
TEST: add test
FIX: fix test assertion
FIX: fix push_back
TEST: test improvements
IMPL: proplist & test improvements
TEST: implement printing additional info
FIX: fir update_set
IMPL: pa_proplist_contains()

now paplay does not complain about proplist
DOC: add license header to test.c
IMPL: very dumb "implementation" of utf8-to-locale