bumped the versions to 1.8-dev
render the response body before attempting to process it; closes #1546
updated submodule references
updated submodule references
make sure __toString() is doing it's magic. closes #1576
updated submodule references
updated submodule references
updated submodule references
updated submodule references
updated submodule references
Merge branch '1.8/develop' of https://github.com/fuel/fuel into 1.7/master