Revision history for namespace::clean::xs.

#TODO: inline pieces from hv_delete when we already have an entry

0.09 Tue Nov 21 01:54:49 MSK 2017
    - skip threading tests on perl 5.10.0
    - update docs

0.08 Thu Nov 16 18:28:10 MSK 2017
    - fix tests for perl 5.27.6

0.07 Thu Jun  9 16:03:22 MSK 2016
    - fix compilation for older clang

0.06 Thu Apr 28 14:43:32 MSK 2016
    - backport to 5.10

0.05 Sat Apr  2 13:18:40 MSK 2016
    - fix explicit cleaner for non-sub entries
    - perform more thorough cleanup for leftover globs

0.04 Thu Mar 17 02:41:57 MSK 2016
    - workaround rt#127708

0.03 Mon Mar 14 21:15:46 MSK 2016
    - set namespace::clean compability version

0.02 Mon Mar 14 20:08:41 MSK 2016
    - speedup storage lookups by using preshared keys
    - fix compilation in c89 mode
    - threading tests

0.01 Mon Mar 14 00:43:39 MSK 2016
    - initial release