Sketches for libeio support
Forgot to commit the tests
Extended the eio wrapper API
throwaway
pbuilder /dev/shm workaround

As pbuilder does not mount a tmpfs onto /dev/shm, I've added an
environment variable, which is capable of overriding default fbr_buffer
file pattern. It is checked only when fbr_context is initialized.
Sketches for libeio support
Forgot to commit the tests
Extended the eio wrapper API
Fixed rebase
Fixed buffer memory benchmark
Removed libvrb from eio branch as well
Merge branch 'eio' of github.com:Lupus/libevfibers into eio

Conflicts:
	CMakeLists.txt
	bench/buffer.c
	include/evfibers/fiber.h
	include/evfibers_private/fiber.h
	src/fiber.c
	test/main.c
Added a wrapper for eio_custom
Async worker is gone in favour of libeio wrapper
More unittests for eio wrappers
Removed bench/* from coverage report
Fixed debian package to inclide eio by default

Also removed protobuf related package dependencies.
Added config.h to the list of installed headers
Merge branch 'eio'

Conflicts:
	include/evfibers_private/fiber.h
	src/fiber.c
Moved pri argument to the end of argument list