1. Fixed 'hot code reload' bug. Got rid of lambda-function in 'mcd.erl'.
2. dht_ring' was moved to deps.
3. Added specs to all external (and not BC) functions in 'mcd.erl'.
4. Added well-named functions to all operations. Old-style function
do' was marked as prohibited, will be removed in next version.
5. Added function for emulation "overload" error for tests purposes.
6. All usages of deprecated method 'delete/2' were replaced with
'delete/1'.
7. mcd_cluster main logic was reworked.
8. mcd_starter replaced to mcd_cluster_sup and made more stable.
9. Added mcd_parallel to work with several buckets synchronously.
10. Added a lot of tests.
11. Marked old convention about 'localmcd' as prohibited (and will be
deleted in the future releases).
12. Renamed 'install' target in Makefile to 'install-lib'. Added some
new targets.