bugfix: fixed compilation failures with nginx 1.7.11+ configured with…
doc: claimed that we work with nginx 1.7.4.
doc: we work with nginx 1.7.2.
updated docs to reflect recent changes.
valgrind.suppress: removed most of the "possibly leaked" false positi…
now we check the ngx_devel_kit dependency at config time and provide …
…a more friendly error message if it is missing.
fixed a typo.
cleaned up the code abit and also added some debugging outputs.