[mod_proxy] send Content-Length for all non GET/HEAD requests
restructure docs
[doc] document core config and modules in tree
[tests] include test ca in dist
remove old test file
[autotools] include cmake files in dist
[autotools] remove generated ragel parsers from dist
[dist] add script to show differences between git and dist
[mod_status] use PACKAGE_BUILD_DATE instead of __DATE__/__TIME__
[core] make PACKAGE_BUILD_DATE an embeddable string constant
[core] add PACKAGE_NO_BUILD_DATE define to disable PACKAGE_BUILD_DATE
[mod_gnutls] don't abort if 'NORMAL:-CIPHER-ALL:+ARCFOUR-128' is not recognized, use 'NORMAL' instead
[autotools] search math lib m for fmod
[common] refactor liValue to share most of the code

 * removing unused "range" value type in angel
[config] fix conditional parsing

  conditional expressions include values to compare with; any
  complicated value expression must be put into parantheses.
  -> stop parsing after a simple value, don't search for operators,
     "and"/"or" operators are handled by the conditional
[plugin_core] fix index "/filename" handling
[backends: scgi,proxy,fastcgi] update *context immediately after *backend_get

- fixes use-after-free, usually caught by an assert in
  li_backend_wait_stop
[angel] rewrite parser, changing syntax (similar to main config)
[common] remove hash value type (use key/value lists instead)
[angel] rewrite config handling, rename items, document it

  * remove "instance { ... }" wrapping
  * use "_" instead of "-"
  * modules -> modules_path
  * allow_listen { ip "..."; } -> allow_listen_ip "...";
  * allow_listen { unix "..."; } -> allow_listen_unix "...";