Git-ignore some build products in examples/
Fix trace in dpl_req_gen_http_request()

Which was using var->val->string like it was before it became an sbuf.
Print an error message when hostname lookup fails

Because that's either a DNS problem or a misconfiguration, and thus
something we want to know about, unlike a failure to connect to the host
itself.
Simplify dpl_profile_load()

We don't need 2 'ret' variables, one is enough.  Nor do we need to smash
called functions' error results down to DPL_FAILURE just yet, our caller
will do that just fine.
Add dpl_ctx_new_from_dict()

which creates a context using profile information from a dict
rather than reading from a file.
Fix inconsistency in dpl_sysmd_print()

print everything to the passed FILE* rather than emitting some things
directly to stdout.
Fix inconsistency in buf_point_error()

Errors in the pricing model file were reported partly to stderr and
partly to stdout.  Report them entirely to stderr.
Introduce DPL_LOG() infrastructure
Use DPL_LOG() to report errors instead of stderr.
Remove spurious httpreply.c.orig file

which was obviously checked in by mistake.
Remove comment accident in droplet.h
Use DPL_LOG in addrlist.c too.
Fix external documentation for dpl_set_log_func()
Fix formatting error in DPL_LOG()
Merge pull request #146 from gnb/docs2

Docs2