Merge pull request #53 from blabaere/master

Fixes issues #44 & #45
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.