fix session
update ruby version
bump v0.4.2
update changelog [ci skip]
add rack middleware
Merge branch 'rack_middleware' of https://github.com/smostovoy/mongodb_logger into development
added rack middleware readme
#47 added Rails::Engine in readme
begin new tests
rails 4
gemfiles
aruba
tests
begin new steps
begin new steps
begin new steps
begin new huge step
mongo
new tests
new tests