* Improve configure system by implementing dependencies
* Add .depend files for subdirs that requre it
* Write simple test for expressions parser

* Fix test suite build under linux

  this allows accessing to modules config from perl modules

  without calling of ~1000 free syscalls
* Add memory_pool_alloc0 for initializing newly allocated space in pool with zeroes

* Add some documentation to rspamd (about new filters logic and about protocol)

 - fix cases when new chunk is allocated
 - add memory pool allocator statistics
 - let it work in multi-threaded environment
 - add strdup function for convinience
* Use memory pool allocator more widely to avoid memory leaks in future and optimize performance
* Task pool chunk size is now pre-defined constant (16 Kb currently)

* Add test case for memory pools

* Make AV reference mortal as it is described in perlxs (3)

 - simplify protocol parsing logic
 - add compatibility with sa-spamd
 - TODO: add protocol output for all commands

 - memory pools would be used in modules for allocating task specific data without freeing it separately
 - memory pools growth is implemented as multiplying by 2 its length (for avoiding multiply reallocs)
 - when memory pool is freed all data that was allocated from this pool is freed too

* Fix memcached async library to pass test :)

* Rework build system

* Add some more tests to url testcase

TODO: fix html parsing regexp (now it doesn't work)

* Add whitelist and hosters list to params

* Perl should use separate memcached context for its operations (just do memcpy with the same socket)
TODO: add block mechanics here to avoid memcached connection closing before perl operation is finished
* Change logic of perl chain filter

* Add memcached access api for perl
* Reorganize Makefile, add .PHONY targets
* Fix memcached module as now we cannot write or read several keys in async mode

* Add simple test for new memcached library
* Use glib variants of malloc and free functions in rspamd

* Link with PCRE

* Add perl detection and perl linker's and cflags
* Modify configure to work with BSD sed (stupid and ugly)

* Add some protocol parser with evbuffer
* Add pkg-check to configure script for detecting gmime and glib