Adds a test for read_to_end investigation
Adds read_to_end function
Merge remote-tracking branch 'upstream/master' into read_to_end
Fixes issue #50 : API doesn't work with Reader API

Adds an implementation for Reader.read_to_end.
Removes unstable attribute from trait functions.
Adds read_at_least function
Exports Endpoint
Fixes test module by removing use clause
Merge pull request #54 from blabaere/master

Fixes issue #50 : API doesn't work with Reader API