Readd Spring fixing a problem with a git-sourced gem.

cf. #478
downgrade better_errors since we still support ruby 1.9.3 for now
Merge pull request #506 from cantino/downgrade_better_errors

downgrade better_errors since we still support ruby 1.9.3 for now
Merge pull request #503 from knu/respring

Readd Spring fixing a problem with a git-sourced gem.
The development of the nodejs cookbook has been move from github.com/mdxp/nodejs-cookbook to here: github.com/redguide/nodejs
Merge pull request #508 from cantino/update-nodejs-for-chef

The development of the nodejs cookbook has been moved
Stop requiring files that is to be autoloaded.

cf. https://github.com/rails/rails/issues/15767

Back out the move `load_types_in`, which was innocent because it does
not load anything.

Have to make sure #502 does not recur.
Include another concern inside of the `included` block.