V. Rancurel

For now we are limited to 1000 files per buckets.

the convenience function shall use the new version of dpl_list_bucket() with marker parameter and take a callback param. The function does the job of using the marker parameter properly.

cmd_put shall use the global block_size variable

today we support only virtual hosting and not path based access to buckets

must be able to browse rackspace storage

buffer overflow checks, etc