POD typo
Merge pull request #550 from memememomo/master

POD typo
removed deprecated attrs method from Mojo::DOM
bring back some lost documentation
fixed small assignment bug in content helper
mention that named buffers are shared
no need to assign application
documentation tweaks
moved error handling from user agent to transaction
document more boolean attribute values
slightly more consistent error handling
better descriptions for route and bridge methods
no need to mention request methods in bridge description
added module Mojo::UserAgent::Proxy
renamed no to not
updated credits
more tests for transactor
small optimization
small optimizations
documentation tweaks