Revert "Revert Berksfile.lock to JSON format"

This reverts commit 4b31f2820aec7367d23361597754bf38d9cd5e1b.

Signed-off-by: Phan Le <ple@pivotallabs.com>
Revert bumping of gems in preparation for Ruby 2.0

This reverts commits f3fa18ee..ccd0e55.

Signed-off-by: Phan Le <ple@pivotallabs.com>
Bump golang cookbook version to 1.4.0

Signed-off-by: Phan Le <ple@pivotallabs.com>